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    Wyświetlanie 1-86 z 86
    Tytuł:
    Nonlinear Zeeman Splitting of Holes in Doped GaAs Heterostructures
    Autorzy:
    Kubisa, M.
    Ryczko, K.
    Jadczak, J.
    Bryja, L.
    Misiewicz, J.
    Potemski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047934.pdf
    Data publikacji:
    2011-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    Opis:
    Polarization-resolved photoluminescence from two-dimensional GaAs/GaAlAs heterostructures doped with acceptors was studied in high magnetic fields. Measurements were carried out in low temperatures up to 2 K and magnetic field up to 21 T. Experiments performed in the Faraday configuration enabled to resolve hole states with different spin orientation. We observed a nonlinear behavior of valence-band g factor in strong magnetic fields. To explain obtained results, a detailed theoretical calculation was carried out based on the Luttinger model for valence-band states. We examined the spin splitting of hole levels under the influence of both external magnetic field and built-in electric field existing in doped heterostructures. Changes of hole g factor with the width of the structure and the density of two-dimensional carriers are discussed.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 609-611
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transport and Thermoelectric Properties of Magnetic Organic Structures
    Autorzy:
    Zberecki, K.
    Świrkowicz, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030828.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.63.-b
    75.75.-c
    Opis:
    Using ab initio methods, we study transport and thermoelectric phenomena of magnetic organic chains functionalized with nitroxide groups. We predict very good thermoelectric performance of the structure, as the conventional and spin Seebeck coefficients are remarkably enhanced. Our results suggest that magnetic organic chains would have a great potential for applications in spintronic devices.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 532-534
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermoelectric Properties of Doped Zigzag Silicene Nanoribbons
    Autorzy:
    Zberecki, K.
    Swirkowicz, R.
    Barnaś, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386845.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.63.-b
    75.75.-c
    Opis:
    Thermoelectric properties of silicene nanoribbons doped with magnetic impurity atoms are investigated theoretically for both antiparallel and parallel orientations of the edge magnetic moments. Spin density distribution and transport parameters have been determined by ab-initio numerical methods based on the density functional theory. Doping with magnetic atoms considerably modifies the spin density distribution, leading to a ground state with a non-zero magnetic moment. Apart from this, the spin thermopower can be considerably enhanced by the impurity atoms.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 505-507
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spin Glass Dynamics of Nanoparticle $La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3$ Obtained by a Mechanochemical Milling
    Autorzy:
    Perovic, M.
    Mrakovic, A.
    Kusigerski, V.
    Blanusa, J.
    Spasojevic, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1534032.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    75.75.Jn
    75.50.Lk
    Opis:
    Spin dynamics of nanoparticle $La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3$ system was studied through the set of diverse magnetic measurements. Analysis of the data obtained from magnetic relaxation measurements, memory effect and AC susceptibility experiments pointed to a spin glass like behavior of interacting nanoparticle system.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 813-814
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetization Reversal Processes in Nanocrystalline (Pr, Dy)-(Fe, Co)-B Bulk Alloys
    Autorzy:
    Przybył, A.
    Pawlik, K.
    Pawlik, P.
    Gębara, P.
    Wysłocki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1387335.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.En
    75.75.-c
    75.75.Cd
    Opis:
    The aim of this paper was to study the phase constitution, magnetic properties and magnetization reversal processes in the rapidly solidified bulk (Pr,Dy)-(Fe,Co)-B alloys doped with Zr, Ti, Mn and Ni. The 3 mm outer diameter tubes samples of the $Pr₈Dy₁Fe₆₀Co₇Ni_{(6x)}MnₓB₁₄Zr₁Ti₃$ (where x = 0, 3, 6) alloys were produced by suction-casting technique. The admixture of Zr was introduced in order to improve their glass forming abilities while Dy was substituted to enhance the magnetocrystalline anisotropy of hard magnetic phase. The effect of Ni and Mn addition on the phase constitution and magnetic properties was studied in the presented work.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 579-581
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Nb Addition on Magnetic Properties of the Nanocrystalline $(Nd₁₀Fe₆₇B₂₃)_{100-x}Nbₓ$ (where x = 1, 2, 4) Alloy Ribbons
    Autorzy:
    Szwaja, M.
    Pawlik, K.
    Pawlik, P.
    Gębara, P.
    Michalski, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1387907.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.En
    75.75.-c
    75.75.Cd
    Opis:
    In the present work the magnetic properties and phase constitution of $(Nd₁₀Fe₆₇B₂₃)_{100-x}Nbₓ$ (where x = 1, 2, 4) alloys in the form of ribbons were investigated. The base alloys were prepared by arc-melting the high purity elements with pre-alloyed Fe-B under an Ar atmosphere. The ribbon samples were obtained by controlled atmosphere melt-spinning technique. In order to generate the nanocrystalline microstructure and hard magnetic properties, samples were annealed at various temperatures (from 923 K to 1023 K) for 5 min. The aim of the present work was to determine the influence of Nb admixture and annealing conditions on the phase constitution and magnetic properties.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 623-625
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Accents in Modern High Saturation Nanocrystalline Fe-Rich Alloys
    Autorzy:
    Butvinová, B.
    Butvin, P.
    Maťko, I.
    Janičkovič, D.
    Kuzminski, M.
    Ślawska-Waniewska, A.
    Švec, P.
    Chromčíková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030276.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Bb
    75.60.-d
    75.75.-c
    Opis:
    Post processing limits for iron-rich Fe-Cu-Si-B-P high-induction rapidly-quenched ribbons have been tested. 530°C/20 min is already too much, formed borides being the essential culprit of magnetic properties deterioration. Unlike standard Si-poor Fe-Nb-Cu-B-Si Finemets, these alloys annealed even in "technical" Ar below the upper limit do not create significant squeezing surfaces.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 711-713
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of the sign of anisotropy constants on the properties of the system of interacting ferromagnetic nanoparticles
    Autorzy:
    Sadek, M.
    Marchwiany, M.
    Woinska, M.
    Majhofer, A.
    Gosk, J.
    Twardowski, A.
    Szczytko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1159850.pdf
    Data publikacji:
    2016-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Mg
    75.50.Tt
    75.75.-c
    Opis:
    We use the Monte Carlo simulation method to investigate the influence of the signs of magnetocrystalline anisotropy constants and the magnetic dipole-dipole interactions on the zero field cooled-field cooled magnetization experiments and hysteresis curves of a system of magnetic nanoparticles. Positive first cubic anisotropy constant K₁ results in larger blocking temperatures and larger coercive fields of a system, while the second anisotropy constant K₂ is practically of negligible importance for the phenomena investigated. Magnetic dipole-dipole interactions are important only in the most dense systems of particles and their effects practically disappear for systems where the distance between the closest particles exceeds three particle diameters.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 1a; A-53-A-55
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electron Mediated Mn-Mn Interaction in Quantum Dots
    Autorzy:
    Bak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/1428517.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    75.85.+t
    85.75.-d
    Opis:
    We present a theoretical study of magnetic interaction in quantum dots with magnetic $Mn^{2+}$ in dot impurities. We show that gate voltage applied to the quantum dot shifts the centers of electron clouds. Exact formulae for the perturbed spin density allow us to derive expression for the change of the strength of the sp-d coupling. Estimations show that sp-d exchange integral is very sensitive to the gate voltage variations. Exact formulae for the change of the effective exchange integrals are derived. As the spin coded qubits are elements of the RAM memory, a part of the energy stored in magnetic coupling will be dissipated when information is written or erased. We estimate this energy and find it sufficiently large to destroy quantum coherence during quantum computing. Finally, we discuss the interdot spin coupling and show the effect of gate voltage operations on the spin intra- and interdot Ruderman-Kittel-Kasuya-Yosida coupling.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 1219-1221
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Normal Modes in a Linear Chain of Nanomagnets
    Autorzy:
    Wal, A.
    Dubiel, Ł.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032392.pdf
    Data publikacji:
    2017-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    75.75.Jn
    71.70.Gm
    Opis:
    The dynamics of magnetization in low-dimensional systems of micromagnets has been a very interesting subject of scientific studies last years. Excitations in such systems may have forms of normal modes. The frequency of the mode can be determined with the use of analytical methods as well as of micromagnetic numerical techniques. One of the latter is the Hamiltonian dynamical matrix method. The method is an analogue of that used to determine oscillations of atoms in crystal. The advantage of it is the possibility of calculating both of all frequencies and profiles of normal modes. Excitations in a finite system can depend on the size of it, as was noticed by experimentalists. The aim of this study is an analysis of eigenstates of the chain consisting of finite numbers of nanomagnets and dependence of states on orientation of magnetic moments and external magnetic field.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 1; 100-102
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spin-wave Instability Theory for Ferromagnetic Nanostructures
    Autorzy:
    Haghshenasfard, Z.
    Nguyen, H.
    Cottam, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1189207.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Ds
    75.75.-c
    75.78.-n
    Opis:
    A microscopic, or Hamiltonian-based, theory is outlined for studying the spin-wave instability thresholds of the parametric processes occurring in ferromagnetic nanostructures under conditions of pumping with a microwave field. Most previous work has concentrated on spheres or films with dimensions of order several μm or more, with the theoretical interpretation being made in terms of macroscopic (or continuum) methods. At smaller length scales, as in ultrathin films and nanowires with thickness or lateral dimensions less than about 100 nm, the discreteness of the quantized spin waves and their spatial distributions become modified, making it more appropriate to employ a microscopic approach to the nonlinear dynamics with a lattice of effective spins interacting through the magnetic dipole-dipole and exchange interactions. Effects of microwave pumping (in either the parallel or perpendicular configuration) are incorporated in calculations for the instability thresholds of the quantized spin-wave bands in different nanostructures and materials.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 192-197
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Monte Carlo Simulations of Ferromagnetic Nanocomposites
    Autorzy:
    Woińska, M.
    Majhofer, A.
    Gosk, J.
    Szczytko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1403635.pdf
    Data publikacji:
    2012-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Mg
    75.50.Tt
    75.75.-c
    Opis:
    We present results of Monte Carlo simulations of a model system of Co nanoparticles in an external magnetic field. In our simulations we take into account the interaction with the external magnetic field, the energy of crystallographic anisotropy and the dipole-dipole interactions between single domain nanoparticles. We apply the standard Metropolis algorithm to a cluster of 27 randomly distributed superparamagnetic Co nanoparticles. We investigate the dependence of blocking temperature $T_{B}$ on particle and cluster size.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 6; 1019-1021
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Indirect Coupling Between Localized Magnetic Moments in Zero-Dimensional Graphene Nanostructures (Quantum Dots)
    Autorzy:
    Szałowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1201877.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Hx
    75.75.-c
    73.22.Pr
    Opis:
    The indirect Ruderman-Kittel-Kasuya-Yosida (RKKY) coupling between on-site magnetic impurities is studied for two kinds of graphene nanoflakes consisting of approximately 100 carbon atoms, posessing either zigzag or armchair edge. The tight-binding Hamiltonian with Hubbard term is used in non-perturbative calculations of coupling between the impurities, placed at the edge of the structure. In general, for zigzag-edged nanoflakes a pronounced coupling robust against charge doping is found, while for armchair-edged structures the interaction is weaker and much more sensitive to charge doping. Also the distance dependence of indirect exchange differs significantly for both edge forms.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 236-237
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Low-Temperature Magnetic Properties of Nanocomposites Containing Superparamagnetic $Fe_3C$ Particles
    Autorzy:
    David, B.
    Schneeweiss, O.
    Šantavá, E.
    Morjan, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1507060.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.Wx
    75.50.Bb
    75.75.-c
    Opis:
    Two nanopowders containing superparamagnetic $Fe_3C$ particles, superparamagnetic $Fe_3O_4//γ-Fe_2O_3$ particles and carbon black phase were synthesised by the method of laser-induced homogeneous pyrolysis of gaseous precursors. Both were characterised by X-ray diffraction, Mössbauer spectrometry and standard magnetic measurements. The mean crystallite size of $Fe_3C$ was 3 nm for the first sample and 10 nm for the second sample. Mössbauer spectra measured at 27 K and zero-field cooled/field cooled curves measured down to 4 K are reported.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 766-767
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    In-Plane Edge Magnetism in Graphene-Like Nanoribbons
    Autorzy:
    Krompiewski, S.
    Cuniberti, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032763.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    75.30.Gw
    61.48.Gh
    Opis:
    This paper is devoted to identification of the most important factors responsible for formation of magnetic moments at edges of graphene-like nanoribbons. The main role is attributed to the Hubbard correlations (within unrestricted Hartree-Fock approximation) and intrinsic spin-orbit interactions, but additionally a perpendicular electric field is also taken into account. Of particular interest is the interplay of the in-plane edge magnetism and the energy band gap. It is shown that, with the increasing electric field, typically the following phases develop: magnetic insulator (with in-plane spins), nonmagnetic narrow-band semiconductor, and nonmagnetic band insulator.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 828-829
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and Thermophysical Properties of Magnetic Beads Containing Metallic Nanocrystallites
    Autorzy:
    Izydorzak, M.
    Leonowicz, M.
    Skumiel, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490752.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Bb
    75.75.-c
    81.07.-b
    Opis:
    Cobalt, iron, nickel and iron carbide nanocrystallites, stabilized within carbon beads, were prepared by the three-step procedure including formation of metal acrylamide complex, followed by frontal polymerization and pyrolysis of the polymer at various temperatures. The beads containing the nanocrystallites exhibit domination of the ferromagnetic ordering. The analysis of calorimetric results allowed estimation of the efficiency of the hyperthermal effect, under the influence of an alternating magnetic field. The XTT tests show that the extracts prepared on the basis of the $Fe_3C$ containing beads are nontoxic, whereas these made of the composites containing Co and Ni exhibit negligible cytotoxicity for the test article/vehicle ratios 6.25 and 3.125 mg/ml.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1; 68-70
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetism of Nanoparticle $La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3$ under Applied Hydrostatic Pressure
    Autorzy:
    Kusigerski, V.
    Perovic, M.
    Mrakovic, A.
    Blanusa, J.
    Mihalik, M.
    Zentkova, M.
    Spasojevic, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1534028.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Tt
    75.75.-c
    81.07.Bc
    Opis:
    Nanoparticle $La_{0.7}Ca_{0.3}Mn_{0.7}Fe_{0.3}O_3$ with the average particle size of 10 nm was mechanochemically synthesized in the single-step procedure. Temperature and field dependences of magnetization were recorded under both ambient and applied hydrostatic pressure up to 0.47 GPa. At ambient pressure, two magnetic transition points were observed: one of the spin-glass like type at the temperature $T_{f}$ ≈ 34 K, and ferro-to-paramagnet transition at $T_{C}$ ≈ 51 K. Under the applied pressure magnetic parameters gradually changed: (i) both $T_{C}$ and $T_{f}$ were lowered with the increase in pressure; (ii) both high field magnetization $M_{5T}$ and remanent magnetization $M_{Rem}$ decreased with pressure; (iii) coercivity $H_{C}$ increased with pressure. The obtained results show that magnetism of a nanoparticle system with high degree of intrinsic disorder diminishes with the applied pressure that is in compliance with the effect of the increased cationic disorder ("internal pressure") in bulk manganites.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 811-812
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Mechanochemical Treatment on Magnetic Properties of Nanodimensional Magnetite-Type Materials
    Autorzy:
    Cherkezova-Zheleva, Z.
    Zaharieva, K.
    Buchkov, K.
    Blagoev, B.
    Mitov, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1382568.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.60.-d
    75.75.-c
    82.80.Ej
    Opis:
    The presented study compares magnetic properties of Ni-doped magnetites $Ni_{0.5}^{2+}Fe_{0.5}^{2+}Fe_{2}^{3+}O_{4}$ to magnetite $(Fe_3O_4)$ sample. Physicochemical properties of materials were registered by means of X-ray powder diffraction, Mössbauer spectroscopy, saturation magnetization and physical properties measurement systems. It was obtained that used preparation procedures lead to synthesis of single phase spinel materials with close nanodimensional size about 8-12 nm. Mechanochemically synthesized sample shows better magnetic properties as lower blocking temperature of superparamagnetic state and minimal coercivity in comparison to other studied materials.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4; 912-915
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of Epitaxial Fe/(Ga,Mn)As Hybrids
    Autorzy:
    Kalbarczyk, K.
    Dziatkowski, K.
    Szczytko, J.
    Gosk, J.
    Tokarczyk, M.
    Kowalski, G.
    Twardowski, A.
    Bednarski, W.
    Ostrowski, A.
    Waplak, S.
    Martinek, J.
    Liu, X.
    Furdyna, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399140.pdf
    Data publikacji:
    2013-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    75.30.Gw
    75.50.Pp
    75.50.Bb
    Opis:
    Thin-film structures composed of two kinds of ferromagnetic material - metallic Fe and semiconducting (Ga,Mn)As - were investigated by means of SQUID magnetometry and ferromagnetic resonance spectroscopy. Dependence of remnant magnetic moment on temperature showed unexpected anisotropic features when recorded along two orthogonal in-plane directions. For one of these orientations, the change in sign of the slope of m(T) curve at the Curie point of (Ga,Mn)As was observed, while for the other, an analogous m(T) curve retained monotonic character. Based on the comparison with ferromagnetic resonance data, the apparent non-monotonicity was attributed to the temperature-induced change of balance between the external magnetic field and uniaxial magnetic anisotropy in the plane of Fe layer.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 5; 873-876
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic properties of hexagonal graphene nanomeshes
    Autorzy:
    Zwierzycki, M.
    Ryndyk, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1054780.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.22.Pr
    75.75.-c
    72.25.Dc
    Opis:
    Graphene nanomeshes are the nanostructures consisting of graphene flake with a regular pattern of antidots (holes) punched through it. Thanks to the energy gaps opening in electronic spectrum, nanomesh-based transistors offer improved I_{on}/I_{off} ratio of the collector current while supporting up to 100 larger driving currents than nanoribbon-based devices. In this paper the electronic and magnetic structure of graphene nanomeshes with hexagonally shaped antidots was studied. It has been found that the internal zigzag edges support magnetic moments and that lowest energy magnetic configuration is antiferromagnetic. The density of states calculated for ground state configuration exhibit the energy gap which can be substantially reduced upon switching (e.g. by external magnetic field) to ferromagnetic configuration. Based on this we predict that the structure will exhibit magnetoresistive effect, which makes graphene nanomeshes of this kind relevant for spintronic applications.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 830-832
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoresistance of Electrochemically Produced NiFe and CoNiFe Nanowires
    Autorzy:
    Avcu, D.
    Atalay, F.
    Aydogmus, E.
    Kaya, H.
    Atalay, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1215584.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.Gf
    81.15.Pq
    75.75.-c
    Opis:
    CoNiFe and NiFe nanowires were electrochemically produced by dc electrodeposition on highly ordered porous anodic alumina oxide templates. Scanning electron microscope images of nanowires after removing the alumina membrane showed that these nanowires are uniform with the diameters of about 220-300 nm and about 25-30 μm length. The energy dispersive X-ray analysis showed that the composition of the nanowires is $Ni_{88}Fe_{12}$, $Co_7Ni_{82}Fe_{11}$. Magnetic field was applied by an electromagnet and resistance was measured by four point technique.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 230-231
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Novel Multichannel Single Photon Correlations Technique Applied for the Spin Dynamics Study of a Few Mn^{2+} Ions in a CdTe/ZnTe Quantum Dot
    Autorzy:
    Malinowski, F.
    Koperski, M.
    Goryca, M.
    Smoleński, T.
    Golnik, A.
    Kossacki, P.
    Wojnar, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1399084.pdf
    Data publikacji:
    2013-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.67.Hc
    72.21.La
    75.75.-c
    Opis:
    In this work we demonstrate a novel experimental approach to the study of single photon correlations. The introduction of the multichannel detection setup enables the simultaneous measurement of a large number of correlation functions for photons emitted from different energetic ranges. The advantages of this new approach were exploited in a detailed study of the biexciton-exciton recombination cascade in CdTe/ZnTe quantum dots doped with a few $Mn^{2+}$ ions. The information about the dynamics of the magnetic system in the quantum dot during the lifetime of the exciton was obtained from the analysis of the correlation functions.
    Źródło:
    Acta Physica Polonica A; 2013, 124, 5; 791-794
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of "As-Prepared" and Chemically Modified Multiwalled Carbon Nanotubes
    Autorzy:
    Kuryliszyn-Kudelska, I.
    Małolepszy, A.
    Mazurkiewicz, M.
    Stobinski, L.
    Dobrowolski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047920.pdf
    Data publikacji:
    2011-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.48.De
    81.20.Ym
    75.75.-c
    Opis:
    In this work we have studied the structural and magnetic properties of "as-prepared" multiwalled carbon nanotubes, synthesized by the chemical vapor deposition method, and chemically modified multiwalled carbon nanotubes. Transmission electron microscopy was used to show multiwalled carbon nanotubes structure. The results of systematic magnetic property measurements on multiwalled carbon nanotubes are presented. The static and dynamic magnetic responses, such as the temperature dependence of the linear AC susceptibility and DC magnetization up to 9 T were studied. We have observed significant changes in magnetic AC susceptibility and magnetization for "as-prepared" and chemically modified multiwalled carbon nanotubes samples.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 597-599
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoimpedance Effects in Electrodeposited NiFe Nanowire Array
    Autorzy:
    Aydogmus, E.
    Kaya, H.
    Atalay, F.
    Atalay, S.
    Avcu, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1207745.pdf
    Data publikacji:
    2014-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.Gf
    81.15.Pq
    75.75.-c
    Opis:
    In this work, NiFe nanowires were grown in highly ordered porous anodic alumina oxide templates by dc electrodeposition at a pH value of 2.6. Scanning electron microscopy showed that wires have diameters of about 250-310 nm and length 25-30 μm. The energy dispersive X-ray analysis showed that the composition of the nanowires is $Ni_{65}Fe_{35}$. Electrical contacts were made on both sides of the nanowire array and their magnetoimpedance properties were investigated. All the magnetoimpedance curves showed single peak behavior due to the high shape anisotropy. The maximum magnetoimpedance change at the 79 MHz driving current frequency was ≈ 1.45%.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 2; 227-229
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Behaviour of Ferritin Nanoparticles
    Autorzy:
    Miglierini, M.
    Lancok, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1534808.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    31.30.Gs
    75.75.-c
    Opis:
    Characterization of magnetic behaviour of ferritin nanoparticles of biological origin is presented. Two types of samples prepared from human and horse spleen tissues were investigated by $\text{}^{57}Fe$ Mössbauer spectrometry. At room temperature, ferritin nanoparticles exhibit superparamagnetic behaviour due to their small dimensions. First occurrence of magnetic interactions was noticed below 60 K. Blocking temperature of human and horse ferritin nanoparticles was determined to be of 16 K and 32 K, respectively.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 944-945
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of $V_{2}O_{3}$ Nanooxide Prepared Mechanochemically With and Without Salt Matrix
    Autorzy:
    Dvurečenskij, A.
    Billik, P.
    Cigáň, A.
    Bystrický, R.
    Maňka, J.
    Škrátek, M.
    Majerová, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1372489.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    85.25.Dq
    75.75.-c
    61.46.+w
    Opis:
    We present a new technological route of synthesis of $V_{2}O_{3}$ nanocrystals based on mechanochemical reduction of $V_{2}O_{5}$ with $Na_{2}SO_{3}$ as a reductant, followed by low temperature vacuum annealing. The structural and magnetic properties of the $V_{2}O_{3}$ nanocrystals were studied.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 398-399
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fabrication and Study of the Magnetic Properties of $(Fe_{30}Co_{70})_{100-x}Zn_{x}$ Nanowire Arrays
    Autorzy:
    Sedghi, A.
    Zolfi, F.
    Vali Aghaie, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1400557.pdf
    Data publikacji:
    2015-06
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.Gf
    81.15.Pq
    75.75.-c
    Opis:
    $(Fe_{30}Co_{70})_{100-x}Zn_{x}$ (0 ≤ x ≤ 10) nanowires with diameters of ≈ 37 nm have been fabricated by AC electrodeposition into pores of anodized aluminum oxide (AAO) templates. The $Fe_{30}Co_{70}$ and Zn contents of the nanowires have been adjusted by varying the ratio of $Fe_{30}Co_{70}$ and Zn ion concentrations in the electrolyte. The effect of the Zn content and annealing on the magnetic properties (e.g., coercivity and squareness) of nanowires arrays have been investigated using X-ray diffraction, scanning electron microscopy, and alternating gradient force magnetometer. X-ray diffraction patterns reveal that an increase in the concentration of Zn ions of the electrolyte results in significant reduction in coercivity and squareness. It was found that the magnetic properties of nanowires can be significantly improved by appropriate annealing process. The highest values for coercivity (2670 Oe) and squareness (0.99) have been obtained for nanowires electrodeposited using 95/5 and 98/2 $Fe_{30}Co_{70}:Zn$ concentrations at annealing temperatures of 575°C and 550°C, respectively.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 6; 1706-1711
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoresistance of Electrodeposited Co/Cu Multilayer Nanowires
    Autorzy:
    Avcu, D.
    Atalay, F.
    Atalay, S.
    Kaya, H.
    Aydogmus, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401297.pdf
    Data publikacji:
    2015-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.07.Gf
    81.15.Pq
    75.75.-c
    Opis:
    Co/Cu multilayer nanowires were electrodeposited potentiostatically on highly ordered porous anodic alumina oxide templates. Scanning electron microscopy (SEM) showed that wires have diameters of about 250-300 nm and length of 40-50 μm. Co/Cu multilayer nanowire arrays embedded in anodic alumina oxide were mechanically polished with diamond in a suspension of oil until the wires appeared. Then the top and bottom surfaces of the material were coated with a layer of Au with a thickness of 100 nm for electrical contacts. Magnetic field was applied by an electromagnet and resistance was measured by four point technique.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 4; 1115-1117
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thickness Dependence of Mössbauer Parameters for Fe₇₈Si₉B₁₃ Metallic Glass Ribbons
    Autorzy:
    Amini, N.
    Miglierini, M.
    Hasiak, M.
    Dekan, J.
    Habibi, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032172.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.60.Ej
    75.75.-c
    76.80.+y
    Opis:
    Changes in magnetic microstructure of Fe₇₈Si₉B₁₃ ribbons were investigated by the Mössbauer spectrometry as a function of their thickness. The latter decreases inversely with the quenching wheel velocity. Amorphicity of the samples was checked by X-ray diffraction and the Mössbauer spectrometry. Average values of hyperfine magnetic fields do not appreciably differ with the production velocity. On the other hand, notable deviations are observed in the position of a net magnetic moment. After annealing with moderate temperature, the magnetic anisotropy improves as indicated by an increase of the average value of hyperfine magnetic field. However, magnetic moments turn out of the ribbon plane and this process continues towards higher production velocity, i.e., smaller thickness of the ribbons. No appreciable deviations in the investigated Mössbauer parameters were revealed after annealing during different time intervals.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 666-668
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Frustration Measure for Molecular Magnets with Single-Ion Anisotropy
    Autorzy:
    Kozłowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030687.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.45.+j
    75.50.Xx
    75.75.-c
    03.67.Mn
    Opis:
    The universal frustration measure and its extension to anisotropic systems is calculated for a family of spin Hamiltonians modeling a hypothetical ring-shaped chromium-based molecular magnets. The proposed extension takes into account the impact of single-ion anisotropy on the magnetic centers and behaves more consistently with respect to the isotropic counterpart. The influence of anisotropy on both measures is assessed, which leads to a conclusion that frustration decreases with increasing absolute value of single ion anisotropy.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 423-425
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature behaviour of hyperfine magnetic fields in a Fe-Co-Si-B-Mo-P metallic glass followed with ⁵⁷Fe Mössbauer spectrometry
    Autorzy:
    Cesnek, M.
    Miglierini, M.
    Kmječ, T.
    Kohout, T.
    Amini, N.
    Janičkovič, D.
    Matúš, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1053048.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Kj
    75.60.Ej
    75.75.-c
    76.80.+y
    Opis:
    Amorphous glass with nominal chemical composition Fe₅₁Co₁₂Si₁₆B₈Mo₅P₈ was studied by combination of the Mössbauer spectroscopy and magnetic measurements in order to characterize magnetic and structural features. Temperature evolution of the Mössbauer spectra revealed presence of broad distribution of hyperfine magnetic field at lower temperatures which vanishes with increase of temperature. The Curie temperature estimated from the Mössbauer spectroscopy experiments is T_{C} ≈ 392 K. This value is in a good agreement with that obtained by magnetic measurements (T_{C}=397 K). The Mössbauer spectroscopy spectra of the sample annealed at 823 K revealed a presence of crystalline components. This temperature is notably lower than the expected temperature of the onset of crystallization observed by differential scanning calorimetry ( ≈ 835 K).
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 744-746
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of the Nanocrystalline $DyMnO_{3}$ Compound
    Autorzy:
    Dyakonov, V.
    Szytuła, A.
    Baran, S.
    Kravchenko, Z.
    Zubov, E.
    Iessenchuk, O.
    Bazela, W.
    Dul, M.
    Zarzycki, A.
    Szymczak, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/1538453.pdf
    Data publikacji:
    2010-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.cp
    75.47.Lx
    75.50.Ee
    75.75.-c
    Opis:
    We report on the X-ray powder diffraction and magnetic measurements of the polycrystalline and the two nanocrystalline samples of $DyMnO_{3}$ compound synthesized at temperatures of 800 and 850°C. All samples at room temperature crystallize in the orthorhombic crystal structure (space group Pnma). The crystal structure parameters determined change only slightly with preparation methods but the average grains size of the nanoparticles determined from X-ray data increases significantly with increasing annealing temperature. Temperature dependence of the magnetic susceptibility indicates the antiferromagnetic order in Dy sublattice at low temperatures.
    Źródło:
    Acta Physica Polonica A; 2010, 117, 4; 607-610
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Intrinsic Forces in Toroidal Cores Wound of Soft-Magnetic Ribbons
    Autorzy:
    Butvinová, B.
    Butvin, P.
    Švec, P.
    Chromčíková, M.
    Vlasák, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1534033.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.20.En
    75.60.Ej
    75.75.-c
    81.40.-z
    Opis:
    Magnetic anisotropy as shown by hysteresis loops of tape-wound toroidal cores has been inspected as to the specific response of the anisotropy to core-internal forces during and after annealing. The loops of toroids are compared to that of strip samples annealed together in various ambience. The core-internal forces were manipulated by means of different core construction, too. The results show that it is the heterogeneity, which produces the most effective forces. Different annealing-induced ribbon shrinkage makes the cores effectively heterogeneous and governs their magnetic response, whereas inherent ribbon heterogeneity affects the core properties, too, and is essential for homogeneous cores.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 815-817
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and Magnetic Characteristics of $Co_{1-δ}Zn_{δ}Fe_2O_4$ Ferrite Nanopowders
    Autorzy:
    Kubisztal, M.
    Herok, I.
    Karolus, M.
    Prusik, K.
    Haneczok, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398315.pdf
    Data publikacji:
    2017-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Lx
    75.50.Gg
    75.50.Tt
    75.75.-c
    75.75.Cd
    Opis:
    In the present paper the $Co_{1-δ}Zn_{δ}Fe_2O_4$ (0 ≤ δ ≤ 1) ferrite nanopowders with a spinel type structure were synthesized using a chemical co-precipitation technique with constant flow rate $ν _{FR}$=120 cm³/min at three different reaction temperatures i.e. $T_r$ =50°C, 70°C and 90°C. Magnetic and structural characteristics of the obtained materials were investigated by means of X-ray diffraction method, transmission electron microscopy and vibrating sample magnetometer. In the course of studies hysteresis loops M(μ₀H) and the relations of magnetization $M_{7T}$ (determined at $\text{}_{μ0}H $=7 T), squareness ratio S and the Néel temperature $T_{N}$ versus Zn content were determined and discussed in detail. It was shown that for δ<0.6 the increase in reaction temperature $T_r$ results in a significant increase of the measured magnetic characteristics. In particular, in the case of $Co_{0.8}Zn_{0.2}Fe_2O_4$ ferrite nanopowder magnetization $M_{7T}$ reaches maximal value of about 80 emu/g.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 5; 1236-1239
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Template Assisted Deposition of Ferromagnetic Nanostructures: from Antidot Thin Films to Multisegmented Nanowires
    Autorzy:
    Prida, V.M.
    Salaheldeen, M.
    Pfitzer, G.
    Hidalgo, A.
    Vega, V.
    González, S.
    Teixeira, J.
    Fernández, A.
    Hernando, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032144.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.70.Kw
    75.75.-c
    75.70.-i
    75.70.Rf
    Opis:
    The growth of nanostructured materials by means of different deposition methods employing nanoporous anodic aluminum oxide membranes as patterned templates has been widely used during last years due to the outstanding features displayed by these nanoporous templates. Here we report on the synthesis, morphology and magnetic properties exhibited by novel magnetic 1D and 2D nanostructured materials having nanowire or antidot thin films geometry, respectively, together to that of geometrically diameter modulated ferromagnetic nanowires. Their magnetic properties will be analyzed and discussed based on the different anisotropic behavior derived from their morphological and microstructural features.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 822-827
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Size dependent heating efficiency of multicore iron oxide particles in low-power alternating magnetic fields
    Autorzy:
    Smolkova, I.
    Kazantseva, N.
    Vitkova, L.
    Babayan, V.
    Vilcakova, J.
    Smolka, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1054706.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.47.Lx
    75.50.Mm
    75.60.Jk
    75.75.-c
    75.78.-n
    Opis:
    Aggregates of superparamagnetic nanoparticles, so called multicore particles get much attention due to collective magnetic behaviour. Despite the fact that saturation magnetization and coercivity of multicore particles are lower than for single particles of comparable size, they can generate large amount of heat in alternating magnetic field. This makes them promising for magnetic hyperthermia. However, correlation between internal magnetic structure of multicore particles and their heating ability in alternating magnetic fields are not clear yet. Detailed experimental investigations are required to determine the optimal sizes of multicore particles and the alternating magnetic field parameters to obtain maximal heat. In this study, we demonstrated how hydrodynamic size of multicore particles influences alternating magnetic field energy absorption. Dense aggregates composed of bare magnetic iron oxide nanoparticles of 13 nm were obtained by coprecipitation. Further peptization allowed to gain aqueous dispersions of multicore particles with various hydrodynamic size, varing from 85 to 170 nm, due to electrostatic stabilization. Multicore particles dispersions have saturation magnetization of 40 A m²/kg_{Fe₃O₄} and coercivity of 79.6 A/m regardless of their size. Dispersion of 85 nm multicore particles is stable and provides specific loss power of 42 W/g_{Fe}. Further increase of hydrodynamic size leads to low stability and loss of the ability to generate heat in alternating magnetic field.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 663-665
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer Studies of Core-Shell Nanoparticles.
    Autorzy:
    Kalska-Szostko, B.
    Cydzik, M.
    Satuła, D.
    Giersig, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506313.pdf
    Data publikacji:
    2011-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.80.Ej
    81.07.-b
    75.75.-c
    81.16.-c
    Opis:
    The ferrite magnetic nanoparticles with core-shell structures were obtained in two step preparation process. The Mössbauer spectra obtained for particles of pure maghemite or magnetite and two layered core-shell one the magnetite on maghemite and maghemite on magnetite are very different from each other. The presented results show that interparticle and intraparticle interaction plays important role in overall magnetic properties as well.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 1; 15-17
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fine Smoothing of Conductive Substrate for Permalloy Layer Electroplating
    Autorzy:
    Butta, M.
    Janosek, M.
    Pilarcikova, I.
    Kraus, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/1201077.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    75.30.-m
    75.50.-y
    07.55.-w
    75.70.-i
    Opis:
    In this paper we study the influence of the roughness of the copper substrate on the magnetic properties of the FeNi film we electroplate onto it. The roughness and the thickness of the copper substrate are reduced by electropolishing in orthophosphoric acid: we show how to select the working point, which gives the highest smoothness, avoiding defects due to gas evolution. Finally we show how a smoother substrate contributes to reducing the coercivity of the magnetic film grown on it.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 150-151
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of Core Dimensions and Manufacturing Procedure on Fluxgate Noise
    Autorzy:
    Janošek, M.
    Vyhnánek, J.
    Zikmund, A.
    Butvin, P.
    Butvinová, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1367343.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    75.30.-m
    75.50.-y
    07.55.-w
    75.70.-i
    Opis:
    The effect of demagnetizing factor and manufacturing procedure on noise of the fluxgate probes, manufactured from metallic glasses, is presented. The fluxgate probes were either tape-wound, or flat, wet-etched ringcore and race-track geometries. When combining low demagnetizing factor and high enough cross-section of the probe, a minimum in the noise dependence can be found. For 50 mm ringcores, in such minimum the noise value as low as $7 pT_{RMS}$ in 0.1-10 Hz frequency band was achieved, which is very low for an as-cast tape, and has not been reported before.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 104-105
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural and Magnetic Properties of Nano-Sized NiZn Ferrites
    Autorzy:
    Ušák, E.
    Šoka, M.
    Ušáková, M.
    Dobročka, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1366899.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Gg
    75.50.Tt
    61.46.Df
    61.05.C-
    75.30.Cr
    75.75.-c
    Opis:
    Structural and magnetic properties (such as e.g. size of crystallites, lattice parameter, magnetic susceptibility, Curie temperature, etc.) of nano-sized $Ni_{0.33}Zn_{0.67}Fe_{2}O_{4}$ ferrites have been studied. The obtained results demonstrated that the sintering temperature is an efficient and simple tool for controlling the size of crystallite particles, thus affecting the resulting magnetic properties. Straightforward relationship between the sintering temperature and the size of crystallites was found, meanwhile no other crystalline phases than the spinel one were detected by two independent analytic methods.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 68-69
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterization of Carbon Nanotubes
    Autorzy:
    Jeníková, M.
    Zakuťanská, K.
    Kováč, J.
    Girman, V.
    Kopčanský, P.
    Tomašovičová, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032760.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.48.De
    74.25.nd
    68.37.Lp
    75.75.-c
    Opis:
    The aim of the presented work was to characterize single-walled carbon nanotubes as well as multi-walled carbon nanotubes by transmission electron microscopy, the Raman spectroscopy and magnetization measurements to obtain information about their size, structure, and magnetic properties. We show that having different carbon nanotubes one can easily distinguish the single-wall or multi-wall carbon nanotubes and determine their quality. The obtained results show that carbon nanotubes can be diamagnetic or ferromagnetic depending on their structural parameters.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 952-954
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dependence of Ultrasonic and Magnetic Hyperthermia on the Concentration of Magnetic Nanoparticles
    Autorzy:
    Kaczmarek, K.
    Hornowski, T.
    Bielas, R.
    Żak, D.
    Timko, M.
    Józefczak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030383.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    43.35.Cg
    43.35.Wa
    87.85.-d
    Opis:
    Hyperthermia treatment is the heating of tumor tissue up to temperatures between 41°C and 45°C, which trigger several physiological reactions in the body. Hyperthermia within tissue can be applied through various mechanisms. One of them is magnetic hyperthermia which uses superparamagnetic iron oxide nanoparticles (SPIONs) heated by an externally applied magnetic field. SPIONs can also be used as sonosensitizers in ultrasound hyperthermia increasing acoustic wave attenuation. The impact of SPION concentration on thermal effect during ultrasonic and magnetic hyperthermia was investigated in agar-gel phantom with added magnetite nanoparticles. The presence of nanoparticles in the tissue-mimicking phantom increases the thermal losses of ultrasound energy and temperature of the phantom.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 716-718
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Size Dependence of Magnetic and Optical Properties of $Co_3O_4$ Nanoparticles
    Autorzy:
    Sarfraz, A.
    Hasanain, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1206616.pdf
    Data publikacji:
    2014-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    81.05.Gc
    61.05.cp
    75.75.-c
    78.66.-w
    Opis:
    The effect of particle size on the magnetic and optical properties of cobalt oxide $Co_3O_4$ has been investigated. Single phase $Co_3O_4$ nanoparticles were synthesized by co-precipitation route and their structure was confirmed through X-ray diffraction analysis. The average crystallite sizes of the nanoparticles as determined from the X-ray diffraction were found to lie in the range of 13 to 59 nm. At room temperature these particles show paramagnetic response and the DC magnetic moment of the samples showed an increasing trend with increasing particle size. Both the antiferromagnetic Néel temperature $T_{N}$ and the low temperature moment depict finite size effects in the AC susceptibility measurements. The optical absorption studies show that there are two direct band gaps in $Co_3O_4$, the main energy band gap and a sub-band located inside the main energy gap. The values of these energy band gaps for the 45 nm particles were determined to be 3.15 and 1.76 eV, respectively. The direct band gap in these particles clearly shows a blue shift with decreasing size attributable to the quantum confinement effect.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 1; 139-144
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transformation of Hyperfine Interactions in Co-Substituted Nanoperm-Type Alloys during Annealing
    Autorzy:
    Hatala, T.
    Miglierini, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1507056.pdf
    Data publikacji:
    2010-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    71.55.Jv
    42.25.Fx
    75.75.-c
    Opis:
    Structure and magnetic order of rapidly quenched $(Fe_{1-x}Co_{x})_{79}Mo_8Cu_1B_{12}$ alloys is investigated by $\text{}^{57}Fe$ Mössbauer spectrometry in transmission geometry and by conversion electron Mössbauer spectrometry. The effect of heat treatment upon hyperfine interactions was studied as a function of Co contents (x = 0, 0.5). Magnetic dipole interactions developed in both alloys when sufficient number of ferromagnetic nanograins is created after heat treatment. The kinetics of crystallization was derived from in situ diffraction of synchrotron radiation. The progress of crystallization is different at both sides of the ribbon-shaped samples.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 5; 764-765
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exciton Binding Energy and Oscillator Strength in a Shallow Quantum Well in an External Magnetic Field
    Autorzy:
    Zięba, P.
    Piętka, B.
    Łusakowski, J.
    Tralle, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402589.pdf
    Data publikacji:
    2015-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.35.Ji
    75.75.-c
    73.21.Fg
    62.20.-x
    Opis:
    We discuss the influence of an external magnetic field on the exciton energy and the exciton oscillator strength in the shallow quantum wells. We include into consideration the Coulomb attraction between electron and hole, which is rarely taken into account. We self-consistently solve the Schrödinger equation to compare the obtained results with the experimental values.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 2; 237-239
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Type-II InAs/GaAsSb/GaAs Quantum Dots as Artificial Quantum Dot Molecules
    Autorzy:
    Klenovský, P.
    Křápek, V.
    Humlíček, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398560.pdf
    Data publikacji:
    2016-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.21.La
    75.75.-c
    85.35.Be
    68.65.Hb
    Opis:
    We have studied theoretically the type-II GaAsSb capped InAs quantum dots for two structures differing in the composition of the capping layer, being either (i) constant or (ii) with Sb accumulation above the apex of the dot. We have found that the hole states are segmented and resemble the states in the quantum dot molecules. The two-hole states form singlet and triplet with the splitting energy of 4 μeV/325 μeV for the case (i)/(ii). We have also tested the possibility to tune the splitting by vertically applied magnetic field. Because the predicted tunability range was limited, we propose an approach for its enhancement.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 1a; A-62-A-65
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature of a Single Mn Atom in a CdTe Quantum Dot
    Autorzy:
    Papierska, J.
    Goryca, M.
    Wojnar, P.
    Kossacki, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791341.pdf
    Data publikacji:
    2009-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.67.Hc
    71.70.Gm
    78.55.Et
    75.75.-c
    Opis:
    In this work we present a study of the temperature of the single magnetic atom embedded in a semiconductor quantum dot versus excitation power and magnetic field. This temperature is defined by the thermal distribution of spin states of single Mn ion, and results from its interaction with the neighborhood. This temperature was found to be much higher than the temperature of the thermal bath. Its dependence on the excitation power and magnetic field is discussed.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 5; 899-900
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetization Dynamics of a (Cd,Mn)Te Quantum Well in Pulsed Magnetic Field
    Autorzy:
    Kobak, J.
    Goryca, M.
    Kossacki, P.
    Golnik, A.
    Karczewski, G.
    Wojtowicz, T.
    Gaj, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1791344.pdf
    Data publikacji:
    2009-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.67.Hc
    71.70.Gm
    78.55.Et
    75.75.-c
    Opis:
    In this paper we present studies of magnetization relaxation in a (Cd,Mn)Te quantum well containing 3.2% of Mn, after a pulse of magnetic field. The relaxation was found to be very fast, with dominant component faster than 10 ns. Upon application of static magnetic field the relaxation does not slow down, in contrast with the behavior of very diluted quantum wells or bulk material.
    Źródło:
    Acta Physica Polonica A; 2009, 116, 5; 907-908
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer and SQUID Characterization of Iron in Human Tissue: Case of Globus Pallidus
    Autorzy:
    Miglierini, M.
    Boča, R.
    Kopáni, M.
    Lančok, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1382185.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    31.30.Gs
    75.75.-c
    87.85.jc
    Opis:
    Lyophilized samples of human brain tissue from the region of Globus Pallidus were investigated in powder form by $\text{}^{57}Fe$ Mössbauer spectroscopy and SQUID magnetometry. The obtained hyperfine parameters including isomer shift and quadrupole splitting exhibit a ferritin-like behaviour with high-spin Fe(III) sites. Three types of features were derived from temperature development of magnetic susceptibility: dominating diamagnetism, dominating paramagnetism, and intermediate states. The magnetic characteristics of the samples do not correlate with age of the donors.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 240-241
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetoluminescence of a CdTe Quantum Dot with a Single Manganese Ion in Voigt Configuration
    Autorzy:
    Koperski, M.
    Goryca, M.
    Kazimierczuk, T.
    Kossacki, P.
    Wojnar, P.
    Gaj, J. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047960.pdf
    Data publikacji:
    2011-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.21.La
    75.75.-c
    78.55.Et
    78.67.Hc
    Opis:
    We present a study of the neutral exciton and negative trion recombination spectra of an individual CdTe quantum dot with a single manganese ion, in magnetic field measured in the Voigt configuration. We describe experimental results and compare with a theoretical model. The quantitative agreement between the model and the experiment allows us to determine separately the electron g-factor.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 618-620
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Hyperfine Fields of Nanoperm Alloys
    Autorzy:
    Miglierini, M.
    Kohout, J.
    Lančok, A.
    Šafářová, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1428957.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Tt
    75.75.-c
    76.80.+y
    76.60.-k
    68.37.Rt
    Opis:
    Magnetic hyperfine fields of $Fe_{90}Zr_7B_3$ Nanoperm nanocrystalline alloy are characterized by $\text{}^{57}Fe$ Mössbauer spectrometry and $P^{57}Fe$ NMR as well as by magnetic force microscopy. $\text{}^{57}Fe$ NMR enables to distinguish a broad signal of iron atoms located in a residual amorphous matrix from a narrow one which belongs to Fe in nanograins. The former coincides with the distribution of hyperfine fields obtained from $\text{}^{57}Fe$ Mössbauer spectroscopy. In addition, it is possible to make a distinction between NMR signals of the Fe nanograins located in magnetic domains from that of the nanograins positioned in domain walls. This is confirmed by magnetic force microscopy where appearance of maze-domains is observed.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 1263-1265
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Surfactant on Magnetic and Optical Properties of $α-Fe_2O_3$ Nanoparticles
    Autorzy:
    Mirza, I.
    Sarfraz, A.
    Hasanain, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1377739.pdf
    Data publikacji:
    2014-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.66.Qn
    75.47.Lx
    78.67.Bf
    75.75.-c
    78.67.-n
    Opis:
    Hematite $(α-Fe_{2}O_{3})$ nanoparticles and hematite nanoparticles coated with polyvinylpyrrolidone (PVP) are synthesized chemically by co-precipitation. Prolysis and microemulsion methods respectively. An average size of nanoparticles (both coated and uncoated) was found by the broadening of the X-ray diffraction peaks using Scherrer's formula. It was found that coating reduced particle sizes. The attachment of the polymer on the surface of particles was confirmed by the Fourier transform infrared spectroscopy and thermogravimetric analysis. Optical ultraviolet/visible reflectance test also indicated the presence of PVP in coated nanohematites. In magnetic studies, it was observed that coating does not change main magnetic character of the $α-Fe_{2}O_{3}$ nanoparticles however it reduces DC magnetization (as a function of applied field and temperature) to a considerable amount. Moreover it was observed that after coating Morin transition temperature $T_{M}$ and its width $ΔT_{M}$ shifts to lower values, which is another indication of size reduction.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 6; 1280-1287
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structural Design and Characterization of $BaMg_{x}Co_{2-x}Fe_{16}O_{27}$ Hexaferrites Based on ab initio Computations
    Autorzy:
    Bakhtiari, M.
    Nabiyouni, G.
    Besharati-Seidani, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1378257.pdf
    Data publikacji:
    2014-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Gg
    71.20.-b
    75.75.-c
    71.15.Mb
    71.15.Dx
    Opis:
    Structural design of barium hexaferrites $BaMg_xCo_{2-x}Fe_{16}O_{27}$ (x=0.0, 1, 2) has been studied, and the magnetic and electronic structure of that has then been investigated using first principle total energy calculation. All calculations are based on the density functional theory. In order to improve the description of strongly correlated 3d electrons of iron, the general gradient approximation plus Hubbard U (GGA+U) method is used. We found that in the lowest energy configuration Mg and Co ions preferentially occupy the 6g sites. With the increase of Mg content x, the energy gap of $BaMg_xCo_{2-x}Fe_{16}O_{27}$ increases but the lattice constant of unit cell decreases. The magnetic moment of the unit cell for Mg content x=0, 1, and 2 are calculated to be 52, 49 and 46 $μ_{B}$/cell, respectively, in agreement with previous experimental results. The substitutions of Mg and Co at the $BaFe_2^{2+}Fe_{16}^{3+}O_{27}$ decrease electrical conductivity and transit it from a half-metal to semiconductor material. Based on our calculations on electronic band structure, the $BaFe_2Fe_{16}O_{27}$ (BFFO) is a weak half-metal, but $BaMg_2Fe_{16}O_{27}$ (BMFO), $BaMgCoFe_{16}O_{27}$ (BMCFO) and $BaCo_2Fe_{16}O_{27}$ (BCFO) are semiconductors. The electrical resistivity increases by increasing Mg and Co contents due to increase in porosity which prevents the hopping of charge carriers.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 6; 1288-1292
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetostructural Correlations of Nano-Sized Manganites Prepared by Different Ways
    Autorzy:
    Vavra, M.
    Mihalik, Marián
    Mihalik, Matúš
    Zentková, M.
    Lazurová, J.
    Matik, M.
    Briančin, J.
    Arnold, Z.
    Maryško, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1371215.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.-y
    75.47.Lx
    75.30.-m
    75.75.-c
    68.37.Hk
    61.05.cp
    Opis:
    We present the preparation and magnetostructural correlations of binary $NdMnO_{3}$ oxide prepared by four different procedures. Nano-size particle were prepared by simple precipitation of hydroxides (PH), nitrate-glycine synthesis (NG) and self-combustion high-temperature synthesis (SHS), while sol-gel method (SG) produced particles with size of about 2 μm. The as prepared PH and SG particles exhibit amorphous structure, the orthorhombic crystal structure was observed for NG and SHS particles. As prepared PH, NG and SHS are magnetically ordered, annealing leads to magnetic ordering of SG particles.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 304-305
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exact Diagonalization Study of an Extended Hubbard Model for a Cubic Cluster at Quarter Filling
    Autorzy:
    Szałowski, K.
    Balcerzak, T.
    Jaščur, M.
    Bobák, A.
    Žukovič, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032794.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.40.Cx
    75.75.-c
    75.10.Lp
    71.27.+a
    65.80.-g
    05.70.Ce
    Opis:
    In the paper the thermodynamics of a cubic cluster with 8 sites at quarter filling is characterized by means of exact diagonalization technique. Particular emphasis is put on the behaviour of such response functions as specific heat and magnetic susceptibility. The system is modelled with extended Hubbard model which includes electron hopping between both first and second nearest neighbours as well as Coulombic interactions, both on-site and between nearest-neighbour sites. The importance of hopping between second nearest neighbours and Coulombic interactions between nearest neighbours for the temperature dependences of thermodynamic response functions is analysed. In particular, the predictions of the Schottky model are compared with the calculations based on the full energy spectrum.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1012-1014
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Mössbauer Spectrometry Study of Biological Tissues
    Autorzy:
    Bonková, I.
    Miglierini, M.
    Bujdoš, M.
    Kopáni, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032139.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    33.45.+x
    87.64.kx
    31.30.Gs
    87.15.B-
    75.75.-c
    Opis:
    Magnetic microstructure of iron contained in selected biological tissues is characterized and mutually compared. We have studied three types of biological samples prepared from human brain, human and horse spleen. Original samples were lyophilized (dried in a vacuum) thus providing powder forms. As a principal method of study, ⁵⁷Fe Mössbauer spectrometry in transmission mode was used. The Mössbauer spectrometry experiments were performed at room ( ≈300 K) and at liquid helium (4.2 K) temperature. At room temperature Mössbauer spectra show doublet-like features. Such behaviour indicates possible presence of nanoparticles with fluctuating magnetic moments that acquire arbitrary positions. On the other hand, low temperature Mössbauer spectrometry measurements demonstrate significant contribution of sextets that confirmed occurrence of blocked magnetic moments of iron-containing particles. Different relative contributions of magnetic components in the low temperature spectra for the three inspected biological tissues suggest differences in the blocking temperatures of the magnetic nanoparticles present in them.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1081-1083
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magneto-Optical Studies of Narrow Band-Gap Heterostructures with Type II Quantum Dots InSb in an InAs Matrix
    Autorzy:
    Mukhin, M.
    Terent'ev, Ya.
    Golub, L.
    Nestoklon, M.
    Meltser, B.
    Semenov, A.
    Solov'ev, V.
    Sitnikova, A.
    Toropov, A.
    Ivanov, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492858.pdf
    Data publikacji:
    2011-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.75.-c
    71.70.Ej
    78.55.Cr
    78.67.Hc
    78.20.Ls
    75.40.Mg
    Opis:
    Magneto-optical properties of type II heterostructures with InSb/InAs quantum dots has been studied at external magnetic field applied in the Faraday geometry. The emission polarization degree can be changed in the range from 100% σ-minus to 10% σ-plus due to excitation intensity and temperature variation. The detailed calculation of the band structure within a tight-binding approximation is presented. The simulation of the experimental data reveals that the oscillator strength of the optical transitions involving electrons with the spin oriented along and opposite to the magnetic field vector differs by approximately 1.8 times in the heterostructures under study.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 5; 868-869
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Polymer Nanocomposite for Medical Application
    Autorzy:
    Świętek, M.
    Tokarz, W.
    Tarasiuk, J.
    Wroński, S.
    Błażewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1197651.pdf
    Data publikacji:
    2014-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    82.35.Np
    87.85.-d
    87.85.Rs
    75.75.-c
    87.85.J-
    87.85.Lf
    Opis:
    Magnetic sponges derived from biocompatible and resorbable polymers are promising materials for medical applications. These materials have been utilised extensively in research applications for the capture of biomolecules and cells, the construction of tissue scaffolds and in regenerative medicine. The object of this study was a polymer scaffold made of polycaprolactone (PCL) containing a 10 wt% amount of nanomagnetite, manufactured in a two-step method. The porosity and morphological parameters were characterised with the use of μ-computer-aided tomography and scanning electron microscopy. Furthermore, the magnetic properties were evaluated. The obtained results confirmed high porosity and the appearance of randomly oriented pores. Moreover, evaluations of the magnetic properties, of both the magnetite nanopowder and the prepared magnetic nanocomposite, were performed. The tests verified the ferromagnetic character of the materials under investigation.
    Źródło:
    Acta Physica Polonica A; 2014, 125, 4; 891-894
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Light Scattering Investigations of Magnetic Anisotropies in Ultrathin Epitaxial Co Films
    Autorzy:
    Hillebrands, B.
    Krams, P.
    Fassbender, J.
    Mathieu, C.
    Güntherodt, G.
    Jungblut, R.
    Johnson, M. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1861065.pdf
    Data publikacji:
    1994-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Gw
    75.30.Pd
    75.30.Ds
    78.35.+c
    Opis:
    Using Brillouin light scattering, the properties of magnetic anisotropies in ultrathin epitaxial Co films grown on single-crystal Cu substrates are investigated. All relevant magnetic anisotropy contributions are determined, in situ in an ultrahigh vacuum system for the (001)-oriented films, as well as ex situ for other film orientations, which are covered with a Cu cap layer. For (001)-oriented films we find a large in-plane anisotropy contribution of fourfold symmetry. For this contribution the volume and the surface part cancel to zero at the same thickness as found for the onset of ferromagnetic order. This finding is indicative for a stabilization of ferromagnetic order in Co/Cu(001) by in-plane anisotropy contributions. In (1 1 13)-oriented films, which are composed of (001)-terraces aligned along the [11̅0]-direction and spaced by 6.5 atomic distances, an additional uniaxial in-plane anisotropy contribution is found which is identified as being of magneto-elastic origin. For (110)-oriented films three ranges of thickness dependence of the in-plane and out-of-plane anisotropy contributions are found which correlate in the thin-film regime with the growth properties. (111)-oriented films show a linear dependence of the perpendicular anisotropy on the reciprocal film thickness over the full investigated thickness range of 2 to 20 Å.
    Źródło:
    Acta Physica Polonica A; 1994, 85, 1; 179-193
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of BSA Protein on the Contrast Properties of Magnetite Nanoparticles during MRI
    Autorzy:
    Strbak, O.
    Kubovcikova, M.
    Baciak, L.
    Khmara, I.
    Gogola, D.
    Koneracka, M.
    Zavisova, V.
    Antal, I.
    Masarova, M.
    Krafcik, A.
    Kopcansky, P.
    Dobrota, D.
    Frollo, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032224.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.61.-c
    75.75.Fk
    87.15.kp
    Opis:
    The aim of the study was to establish whether there is a significant change in the MRI contrast of magnetite nanoparticles, after BSA protein binding on the surface of particles. The rationale is the applicability of this feature in clinical practice for the tracking of specific proteins which are often associated with various pathologies. Contrast agents could bind to this specific marker, with the change in MRI contrast indicating the presence of pathology. We found that changes in relative contrast acquired at low-field MRI offer potential for the differentiation of magnetite nanoparticles with and without BSA protein. However, the variations in the transverse relaxation time (T₂) and transverse relaxivity (r₂), acquired at high-field MRI, were too small to be applicable for biomedical applications.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1102-1104
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biogenic Magnetite Nanoparticle Ensemble Use in MRI Diagnostics
    Autorzy:
    Strbak, O.
    Krafcik, A.
    Teplan, M.
    Gogola, D.
    Kopcansky, P.
    Frollo, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1202318.pdf
    Data publikacji:
    2014-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Gg
    75.50.Tt
    87.61.-c
    Opis:
    We present a simple analytical tool, which allows the calculation of the MRI diagnostics feasibility of the biogenic magnetite nanoparticles. Elevated levels of these particles are usually linked to the pathological processes, especially to neurodegenerative disorders. We showed theoretically that the biogenic magnetite itself is not sufficient for the non-invasive diagnostics and must be extended with the total iron incorporated in other biological structures.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 1; 388-389
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetization Processes of Hard Magnetic Composites - Monte Carlo Studies aum
    Autorzy:
    Ziółkowski, G.
    Granek, K.
    Chrobak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030445.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Ww
    75.60.Ej
    02.70.-c
    Opis:
    In the present work we performed some simulated annealing plus Monte Carlo studies concerning a hard magnetic spherical particles embedded into soft ferromagnetic matrix as well as irregular branches of soft and hard magnetic phases. Magnetization process of such system depends on exchange interactions of soft and hard magnetic object and interface between them. Especially interesting is the comparison of interactions in systems with different, regular and irregular geometry.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 663-665
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Nickel/Zinc ratio and lanthanum substitution effect on structural and magnetic properties of nickel zinc ferrites
    Autorzy:
    Jančárik, V.
    Šoka, M.
    Ušáková, M.
    Harťanský, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1053078.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.50.Gg
    75.30.Cr
    61.05.C-
    Opis:
    Improvement of NiZn ferrites properties by means on Ni/Zn content ratio modification and by partial substitution of Fe³⁺ ions by La³⁺ ions is presented. Ni_{x}Zn_{1-x}Fe₂O₄ and Ni_{x}Zn_{1-x}La_{0.02}Fe_{1.98}O₄ samples of small particles were prepared by self-propagated combustion method. X-ray spectroscopy was used for structural analysis, temperature dependence of magnetic susceptibility was used for evaluation of chemical and phase composition. Analysis showed that pure spinel structure without secondary phase caused by La ions for all values of Ni/Zn content was present. Noticeable growth of the magnetic susceptibility at room temperature was observed with rising of Zn²⁺ ions content.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 693-695
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Residual stress in Cr₉₉Al₁ polycrystalline thin films
    Autorzy:
    Mudau, Z.
    Sheppard, C.
    Prinsloo, A.
    Venter, A.
    Ntsoane, T.
    Fullerton, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1047677.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    61.05.C-
    68.47.De
    75.30.Fv
    75.50.Ee
    Opis:
    The magnetic phase diagram of bulk Cr_{100-x}Al_{x} shows interesting behaviour close to the triple point concentration of x ≈2. Since the magnetic properties of Cr are influenced by dimensionality, stress and strain, this study focussed on the investigation of Cr₉₉Al₁ thin films prepared on fused silica substrates with thicknesses t varying from 29 to 452 nm using sputtering techniques. Resistance measurements covering the temperature range 2 to 400 K did not show any clear anomalies that could be indicative of changes in the magnetic ordering. X-ray diffraction (XRD) and atomic force microscopy (AFM) studies indicate the films are polycrystalline textured and that the 80 nm sample has the smallest grain size. In-plane stresses in these thin films were studied using the specialised XRD ın²ψ-method. The results show that the stress varies with film thickness. The 29 nm sample has stress in the order of 833 MPa and with increasing film thickness the stress reaches 1471 MPa for the 80 nm layer, where after it systematically reduces for the thicker coatings to 925 MPa for the 452 nm film. The highest stress for the Cr₉₉Al₁ thickness sample series is seen in the film with the smallest grain size.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 578-581
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic and Structural Study of $Mn_{1.15}Fe_{0.85}P_{1-x}Ge_{x}$ (0.25 < x < 0.32) Magnetocaloric Compounds Prepared by Arc Melting
    Autorzy:
    Hawelek, L.
    Wlodarczyk, P.
    Zackiewicz, P.
    Polak, M.
    Kaminska, M.
    Puźniak, R.
    Radelytskyi, I.
    Kolano-Burian, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1402326.pdf
    Data publikacji:
    2015-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.30.Sg
    75.30.Kz
    61.05.C-
    61.66.Fn
    Opis:
    Recently, room temperature magnetocaloric materials increasingly attracted attention in the development of magnetic refrigerators. In this paper, an effect of P/Ge substitution on the magnetic phase transition in the series of $Mn_{1.15}Fe_{0.85}P_{1-x}Ge_{x}$ (0.25 < x < 0.32) magnetocaloric compounds prepared by the arc melting technique and subsequent homogenization process has been studied. Calorimetric and magnetization results show that the temperature of structural phase transition coincide with the Curie temperature and fall within the temperature range 270-355 K. The magnetic entropy change reaches the maximum value for the compound with x=0.28 and equals to 32 J/(kg K) for the magnetic field change of 5 T. The adiabatic temperature change for the same sample, measured using magnetocalorimeter, is equal to 1.2 K for the magnetic field change of 1.7 T. It was found that the increase of Ge content in the sample causes weakening of first order magnetic transition, which is manifested by the lowering difference in transition temperature measured in two zero-field-cooling and field-cooled-cooling regimes.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 1; 76-80
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    EPR Spectra of Multispin Systems. Application to Poly-m-p-Aniline
    Autorzy:
    Juszyński, P.
    Twardowski, A.
    Gosk, J.
    Kulszewicz-Bajer, I.
    Pawłowski, M.
    Dziatkowski, K.
    Szczytko, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2048138.pdf
    Data publikacji:
    2011-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    02.70.-c
    75.10.-b
    Opis:
    In this communication we present NiceMagnetic, software for simulations and analysis of EPR spectrum and SQUID measurements. Systems of arbitrary number N of spin-only magnetic moments (S ≤ 0 and L = 0) were considered within the lines of the Heisenberg and Zeeman Hamiltonians. Effective algorithms used for the computations are discussed. This includes modified secant method adapted to calculate resonance fields with demanded precision. Finally, application of NiceMagnetic to experimental SQUID magnetization and EPR spectra of poly-m-p-aniline, one of recently synthesized high spin polymers containing unpaired electrons will be presented. As a result, exchange integral between electron and nitrogen nuclei spins (ligand hyperfine interaction) J = 6.3 × 10$\text{}^{-4}$ cm$\text{}^{-1}$ was estimated.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 5; 717-719
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hall Effect and Magnetoresistance in Magnetic Multilayers with Alternating In-Plane and Out-of-Plane Anisotropies
    Autorzy:
    Błaszyk, M.
    Luciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1813492.pdf
    Data publikacji:
    2008-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.21.Ac
    73.40.-c
    75.47.De
    75.70.-i
    72.15.Gd
    Opis:
    A direct comparison between the Hall effects and giant magnetoresistance of ferromagnetic multilayers of similar composition $(Ni_{80}Fe_{20}//Au//Co//Au)_N$ with alternating in-plane and out-of-plane magnetization direction of Co layers is presented. The characteristic features at magnetic field-dependence of giant magnetoresistance were correlated with the creation and annihilation of the stripe domains in Co layer, with perpendicular anisotropy. The nucleation field values were investigated as an Au layer thickness function. Furthermore, the in situ conductance measurement results characterised the island growth mode of the ferromagnetic layers. The percolation thicknesses were also indicated.
    Źródło:
    Acta Physica Polonica A; 2008, 113, 2; 663-668
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Deposition Temperature οn Magnetotransport Properties οf Ni-Fe/Au/Co/Au Multilayers
    Autorzy:
    Błaszyk, M.
    Chomiuk, P.
    Buchta, K.
    Luciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810589.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.21.Ac
    73.40.-c
    75.47.De
    75.70.-i
    72.15.Gd
    Opis:
    A correlation between the growth process and electrical properties of $[Ni_{80}Fe_{20}(2 nm)//Au(2 nm)//Co(0.8 nm)//Au(2 nm)]_{15}$ multilayers is presented. A set of multilayers of identical composition was deposited in different temperatures. The changes in giant magnetoresistance amplitude were correlated with the changes in Co layers growth process that occur in different temperatures. The in situ conductance measurement leads to the growth mechanism identification in high temperatures as formation of Co islands. Intensified islandisation of Co was eventually confirmed by the temperature changes in shape of the Hall voltage loops, and the evolution of Co layers contribution.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 363-365
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Interval Computations of Ferromagnetic Resonance Conditions in Exchange-Biased Bilayers
    Autorzy:
    Gutowski, M.
    Żuberek, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1810606.pdf
    Data publikacji:
    2009-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    02.70.-c
    73.21.Ac
    75.30.Et
    75.70.-i
    76.50.+g
    Opis:
    The main purpose of this paper is to promote the use of interval calculus in physics. As an example we use the system consisting of two thin films, one ferromagnetic and another one antiferromagnetic, deposited one atop of the other. We successfully and accurately simulate the positions of resonance fields of such a system, as seen in ferromagnetic resonance experiment. Interval calculations have revealed the presence of 1, 2 and sometimes even 4 distinct equilibrium configurations of the system, all corresponding to the same resonance field, when the field has a component antiparallel to that of cooling field, while only 1 such position when it points in the opposite direction. In both cases only a single resonance line is observed. As an added value we show that the exchange-biased system is in the metastable state, out of true thermodynamical equilibrium.
    Źródło:
    Acta Physica Polonica A; 2009, 115, 1; 390-392
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wpływ odkształcenia na zimno i obróbki cieplnej na właściwości mechaniczne i strukturę taśm przeznaczonych na piły taśmowe
    The effect of cold deformation and heat treatment on mechanical properties and structure of steel strips for band saws
    Autorzy:
    Wiedermann, J.
    Radwański, K.
    Adamiec, A.
    Gazdowicz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/181820.pdf
    Data publikacji:
    2013
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Metalurgii Żelaza im. Stanisława Staszica
    Tematy:
    taśma zimnowalcowana
    stal C75
    obróbka cieplna
    właściwości mechaniczne
    mikrostruktura
    cold-rolled strip
    steel C75
    heat treatment
    mechanical properties
    microstructure
    Opis:
    Celem pracy było określenie wpływu parametrów odkształcenia oraz międzyoperacyjnej i końcowej obróbki cieplnej na właściwości mechaniczne, strukturę i właściwości użytkowe taśm ze stali C75 pod kątem zastosowania ich na piły taśmowe. Taśmę wyjściową walcowaną na gorąco o grubości 2,00 mm poddano walcowaniu na zimno na grubość 0,65 mm w kolejnych 8 przepustach przedzielonych międzyoperacyjną obróbką cieplną. Następnie wykonano próby hartowania i odpuszczania taśm w celu nadania im końcowych właściwości użytkowych, spełniających wymagania na piły taśmowe w zakresie twardości, płaskości i jakości powierzchni. Przeprowadzone badania wykazały, że w oparciu o zastosowane parametry procesów opracowano technologię wytwarzania taśm spełniających wymagania stawiane piłom taśmowym. Uzyskano zadaną kategorię twardości taśm w drodze hartowania i odpuszczania. Końcowa mikrostruktura w zależności od temperatury odpuszczania złożona jest z odpuszczonego martenzytu lub sorbitu. Taśmy spełniają również wymagania związane ze stanem powierzchni oraz płaskością bez efektu korytkowatości.
    The purpose of the work was to determine the effect of deformation as well as in-process and final heat treatment parameters on mechanical properties, structure and functional properties of C75 steel strips with regard to their use for band saws. The 2.00 mm thick initial hot rolled strip was subject to cold rolling to a thickness of 0.65 mm in 8 consecutive passes separated by in-process heat treatment. Then the strip quench hardening and tempering tests were performed to give them their final functional properties meeting the requirements for band saws with regard to hardness, flatness and surface quality. The tests revealed that based on the process parameters used, the technology for manufacturing steel strips meeting the requirements for band saws had been developed. The preset strip hardness category was obtained by quench hardening and tempering. Depending on the tempering temperature, the final microstructure consists of tempered martensite or sorbite. The strips also meet the requirements related to surface condition and flatness with no crossbow effect.
    Źródło:
    Prace Instytutu Metalurgii Żelaza; 2013, T. 65, nr 1, 1; 22-27
    0137-9941
    Pojawia się w:
    Prace Instytutu Metalurgii Żelaza
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Elastic Properties of Zinc Blende MnTe
    Autorzy:
    Djemia, P.
    Roussigné, Y.
    Stashkevich, A.
    Szuszkiewicz, W.
    Gonzalez Szwacki, N.
    Dynowska, E.
    Janik, E.
    Kowalski, B. J.
    Karczewski, G.
    Bogusławski, P.
    Jouanne, M.
    Morhange, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038250.pdf
    Data publikacji:
    2004-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    62.20.Dc
    75.50.Pp
    78.35.+c
    Opis:
    The Brillouin light scattering was used to investigate elastic properties of the zinc blende, MBE-grown MnTe layer that was deposited on a (001) GaAs substrate covered by CdTe buffer layer. The three elastic constants of the zinc blende MnTe, namely c$\text{}_{11}$, c$\text{}_{12}$, and c$\text{}_{44}$, were directly determined for the first time from the frequency of the Rayleigh mode, of the pseudo-surface mode, and of the shear horizontal bulk mode traveling parallel to the layer surface. The value of c$\text{}_{11}$ was checked using the frequency of longitudinal bulk waves propagating at different angles from the normal of the layer plane. This value was also independently determined by results of the folding of acoustic phonons, observed for MnTe/CdTe superlattices by the Raman scattering. Finally, the bulk modulus given by the formula B=(c$\text{}_{11}$+2c$\text{}_{12}$)/3 was determined for zinc blende MnTe by ab initio calculations making use of the density functional theory and atomic pseudopotentials; spin polarization of MnTe was taken into account. A satisfactory agreement between theoretical and experimental values was obtained.
    Źródło:
    Acta Physica Polonica A; 2004, 106, 2; 239-247
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Andreev Transport through a Magnetic Molecule Weakly Coupled to Ferromagnetic Leads
    Autorzy:
    Pawlicki, F.
    Weymann, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030385.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.23.-b
    74.45.+c
    75.50.Xx
    Opis:
    The Andreev transport through a single molecular magnet coupled to two external ferromagnetic leads and one superconducting electrode is studied theoretically by means of the real-time diagrammatic technique. The calculations are performed by including the sequential tunneling processes between the molecule and ferromagnetic leads, while the coupling to superconductor can be arbitrary. We analyze the dependence of the Andreev current and tunnel magnetoresistance on various intrinsic parameters of the molecule. The superconducting proximity effect results in the formation of molecular Andreev bound states. We show that the transport behavior depends greatly on the type of internal exchange interaction of the molecule, which can lead to corresponding sign changes of the tunnel magnetoresistance of the device.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 594-596
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optical Trapping and Propagation of Nonresonantly Driven One-Dimensional Exciton-Polariton Condensate
    Autorzy:
    Opala, A.
    Pieczarka, M.
    Sęk, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1033879.pdf
    Data publikacji:
    2017-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    67.85.De
    71.36.+c
    03.75.Kk
    Opis:
    We study theoretically a nonresonant optical creation of a one-dimensional exciton-polariton condensate in a semiconductor microcavity. The polariton condensate is treated in the mean-field approach, taking into consideration an antitrapping potential created by the reservoir of noncondensed particles. Polariton condensates are excited by multiple lasers, with a combination of continuous wave and pulsed sources. The proposed pump-probe configuration leads to the realisation of various experimental schemes, e.g. optical trapping of a polariton condensate in real space. Moreover, it can be utilised for investigation of elementary excitations in the time domain when polariton condensates from two sources interact with each other.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 2; 401-404
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Charge and Spin Transport in a Metal-Semiconductor Heterostructure with Double Schottky Barriers
    Autorzy:
    Wolski, S.
    Jasiukiewicz, C.
    Dugaev, V.
    Barnaś, J.
    Slobodskyy, T.
    Hansen, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1386690.pdf
    Data publikacji:
    2015-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.30.+y
    73.40.-c
    75.76.+j
    Opis:
    Taking into account the available experimental results, we model the electronic properties and current-voltage characteristics of a ferromagnet-semiconductor junction. The Fe/GaAs interface is considered as a Fe/(i-GaAs)/n⁺-GaAs/n-GaAs multilayer structure with the Schottky barrier. We also calculate numerically the current-voltage characteristics of a double-Schottky-barrier structure Fe/GaAs/Fe, which are in agreement with available experimental data. For this structure, we have estimated the spin current in the GaAs layer, which characterizes spin injection from the ferromagnet to the semiconductor.
    Źródło:
    Acta Physica Polonica A; 2015, 127, 2; 472-474
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of Magnetic Field on Detection Properties of Planar Microwave Diodes
    Autorzy:
    Sužiedėlis, A.
    Ašmontas, S.
    Požela, J.
    Gradauskas, J.
    Nargelienė, V.
    Paškevič, Č.
    Derkach, V.
    Golovashchenko, R.
    Goroshko, E.
    Korzh, V.
    Anbinderis, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1506099.pdf
    Data publikacji:
    2011-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    07.57.Kp
    78.70.Gq
    75.47.Pq
    73.40.Kp
    73.40.-c
    75.70.-i
    Opis:
    The results of experimental investigation of detection properties of the planar microwave diodes of various configuration on DC magnetic field are presented in this paper. The detection of microwave radiation was measured at 51 GHz, 72 GHz and 144 GHz frequencies. The magnetic field was applied in plane and perpendicularly to the plane of the diodes. The experiment was performed at room temperature. Dependence of the detected voltage of the diodes on the magnetic field had asymmetric character with respect to the polarity of the magnetic field. This fact allowed us to suspect the magnetic rectification influencing the detected voltage. Therefore, average value of the detected voltage with respect to the polarity of the applied magnetic field gives its dependence on the applied magnetic field.
    Źródło:
    Acta Physica Polonica A; 2011, 119, 2; 218-221
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anomalous Phase Transitions in $LiCsSO_4$ in the Compressible hcp Ising Model
    Autorzy:
    Lehmann-Szweykowska, A.
    Kurzyński, M.
    Wojciechowski, R.
    Wiesner, M.
    Mróz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1427164.pdf
    Data publikacji:
    2012-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    78.35.+c
    75.10.Hk
    62.20.D-
    Opis:
    Structural low-temperature phase transformations in $LiCsSO_4$ are analysed in a newly tailored simple model of the static soliton in the periodically modulated phases of the one-dimensional compressible Ising model. It is shown that the original hcp symmetry is crucial for understanding of the anomalous temperature-dependence of the Brillouin shift.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 5-6; 1108-1110
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Oblique Reflection of Electrons from a Potential Barrier in Heterostructures
    Autorzy:
    Pfeffer, P.
    Zawadzki, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/1205321.pdf
    Data publikacji:
    2014-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.70.Ej
    73.22.Dj
    73.40.-c
    75.76.+j
    Opis:
    Reflection of electrons from a potential barrier in heterostructures is described. An electric field of the barrier causes spin splitting of electron energies via the spin-orbit interaction and its form is calculated in the three-level $k·p$ model for a nontrivial case of unbound electrons. It is shown that if the potential barrier is the only source of the spin-orbit interaction, the spin-flip electron reflections are not possible. However, there appear two unexpected possibilities related to the spin-orbit interaction: (a) non-attenuated electron propagation in the barrier whose height exceeds the energies of incoming electrons, (b) total reflection of electrons whose energies exceed barrier's height. It is indicated that the system can serve as a source of spin-polarized electron beams.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 3; 820-826
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Resonance Imaging at Low Magnetic Field Using Hyperpolarized $\text{}^{3}$He Gas
    Autorzy:
    Suchanek, M.
    Cieślar, K.
    Pałasz, T.
    Suchanek, K.
    Dohnalik, T.
    Olejniczak, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2042109.pdf
    Data publikacji:
    2005-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    32.80.Bx
    67.65.+z
    75.50.-y
    87.61.-c
    Opis:
    A low magnetic field magnetic resonance imaging system for small animal lung imaging using hyperpolarized $\text{}^{3}$He gas is presented. The hyperpolarized $\text{}^{3}$He gas at 1 mbar pressure and 30% polarization is obtained by the metastability exchange optical pumping technique. The magnetic resonance imaging unit is based on a permanent magnet of open geometry, built from a new generation Nd-B-Fe magnetic material. It produces the magnetic field of 88 mT with homogeneity better than 50 ppm in the 10 cm diameter sphere, after application of passive shimming. The magnetic field gradients of 30 mT/m are generated by a set of biplanar, actively shielded gradient coils. The first $\text{}^{1}$H images of various biological objects, as well as $\text{}^{3}$He images of the rat lung in vivo obtained in the described system are shown. In terms of sensitivity and resolution, the technique is superior to conventional $\text{}^{1}$H magnetic resonance imaging, and offers great possibilities in early diagnosis of lung diseases.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 3; 491-506
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature Dependence of Spin Hall Effect in k-Cubed Rashba Model
    Autorzy:
    Krzyżewska, A.
    Dyrdał, A.
    Berakdar, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1030432.pdf
    Data publikacji:
    2018-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.70.Tj
    72.25.-b
    72.25.Mk
    73.40.-c
    Opis:
    Within the Matsubara Green function formalism and linear response theory we considered theoretically the temperature dependences of the spin Hall effect for a two-dimensional gas with an isotropic k-cubed form of the Rashba interaction. We utilize a standard model for treating spin-orbit phenomena in p-doped semiconductor heterostructures and also for an electron gas formed at perovskite oxides interfaces.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 3; 558-560
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of the Effect of Boron Concentration on Magnetic and Structural Properties of $Nd_{7.5}Pr_{2.5}Fe_{90-x}B_x$ Melt-Spun Alloys
    Autorzy:
    Siddique, M.
    Ahmad, I.
    Kanwal, M.
    Ahmed, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/1401887.pdf
    Data publikacji:
    2015-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    76.80.+y
    75.50.-y
    61.43.-j
    61.05.C-
    Opis:
    The Mössbauer spectroscopy and X-ray diffraction techniques have been used to investigate the effect of boron concentration on the structural and magnetic properties of as-quenched and heat-treated melt-spun alloys $Nd_{7.5}Pr_{2.5}Fe_{90-x}B_x$ (x=6, 8, 10) produced by melt-spinning technique. X-ray diffraction and Mössbauer spectroscopy results indicate that as-prepared samples are completely amorphous in nature. The X-ray diffraction patterns of samples heat-treated at 700°C are indexed as $Fe_{3}B,$ $\alpha-Fe,$ $(NdPr)_{2}Fe_{14}B$ and $Fe_{23}B_{6}$ phases. The Mössbauer spectra of heat-treated samples are very complex and constituted a number of sextets and a quadrupole doublet. Two main phases are $(NdPr)_{2}Fe_{14}B$ hard and $t-Fe_{3}B$ soft magnetic phases while $\alpha-Fe$ and $Nd_{23}Fe_{6}$ are detected as minor phases. The average internal magnetic field decreases with the increase of boron content; more sharply in as-prepared and comparatively slowly in heat-treated samples. The X-ray diffraction and Mössbauer spectroscopy results are in good agreement with each other.
    Źródło:
    Acta Physica Polonica A; 2015, 128, 3; 353-357
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase Diagram and Activation Energy for Vortex Pinning in Nb/(Co,Pd) Superconductor-Ferromagnet Bilayer
    Autorzy:
    Syryanyy, Y.
    Aleszkiewicz, M.
    Cieplak, Marta
    Zhu, L.
    Chien, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/1374109.pdf
    Data publikacji:
    2014-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.F-
    74.25.N-
    74.25.Wx
    74.62.-c
    74.70.-b
    74.78.-w
    74.78.Fk
    75.70.Kw
    75.70.-i
    Opis:
    Using the magnetoresistance measurements we study the phase transition line and the activation energy for vortex pinning in superconductor/ferromagnet bilayer, built of a ferromagnetic Co/Pd multilayer with perpendicular magnetic anisotropy, and a niobium film, with insulating layer in-between to eliminate proximity effect. The domain width is reversibly pre-defined using the angle-dependent demagnetization. We find that the enhancement of the activation energy for vortex pinning by magnetic domains is rather modest, by a factor of about 2.1. We attribute this to large domain width, and large dispersion of the domain width in this bilayer.
    Źródło:
    Acta Physica Polonica A; 2014, 126, 4a; A-123-A-126
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differentiation of Native and Reconstructed Ferritin using the MRI Gradient Echo Pulse Sequence
    Autorzy:
    Balejcikova, L.
    Strbak, O.
    Baciak, L.
    Kovac, J.
    Masarova, M.
    Krafcik, A.
    Kopcansky, P.
    Dobrota, D.
    Frollo, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032829.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.60.Ej
    83.85.Fg
    87.61.-c
    87.64.Cc
    87.85.jf
    Opis:
    Ferritin is a biological iron storage biomacromolecule, consisting of a spherical protein shell (apoferritin) and mineral iron core. It plays a crucial role in the pathological processes of disrupted iron homeostasis followed by iron accumulation, linked with various disorders (e.g. neuroinflammation, neurodegeneration, cirrhosis, cancer, etc.) In vitro reconstructed ferritin, with the assistance of a non-invasive magnetic resonance imaging technique, has the potential to become a suitable biomarker of these pathological processes. Through gradient echo pulse sequencing, we were able to clearly distinguish between native (physiological) and reconstructed/iron-overloaded (pathological) ferritin, which can serve as a starting point for the development of a method for their differentiation. Such method is necessary for the early diagnosis of iron-based diseases.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1093-1095
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    LSMO/YBCO heterostructures and investigation of "negative" resistance effect in the interface
    Autorzy:
    Sojková, M.
    Nurgaliev, T.
    Štrbík, V.
    Chromik, Š.
    Blagoev, B.
    Španková, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1053094.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    73.40.-c
    73.40.Cg
    74.78.Fk
    74.72.-h
    75.50.Cc
    Opis:
    Samples containing the ferromagnetic manganite La_{0.67}Sr_{0.33}MnO₃ (LSMO) and high temperature superconducting YBa₂Cu₃O₇ (YBCO) single thin film areas and YBCO/LSMO bilayer area were prepared on LaAlO₃ (LAO) substrates and were used for investigation of the electrical properties of the interface. The measurements in the YBCO/LSMO interface demonstrated "negative" values of the resistance. A good interpretation of the obtained results was performed in the framework of a 1D model, which took into account the resistance of the interface R_{if} and the temperature dependence of the resistance of YBCO and LSMO films. It was shown that the effect of "negative" resistance arises because of the redistribution of the measuring electrical current in the interphase area if the resistance of the interface R_{if} is small in comparison with the resistances of the neighboring electrodes.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 842-844
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Magnetic Properties of FeSeTe Compound Crystallized from Liquid Phase
    Autorzy:
    Lewandowski, S.
    Berkowski, M.
    Tarenkov, V.
    D'yachenko, A.
    Abal'oshev, A.
    Abal'osheva, I.
    Gawryluk, D.
    Domukhovski, V.
    Sidorov, S.
    Boichenko, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1536749.pdf
    Data publikacji:
    2010-08
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    74.25.Ha
    74.45.+c
    74.62.Bf
    74.70.Xa
    75.30.Cr
    Opis:
    We report on measurements of samples with nominal composition $FeSe_{0.5}Te_{0.5}$, crystallized by the Bridgman method. Magnetic and transport properties of the samples were examined. The measurements confirm the coexistence of ferromagnetism and superconductivity below the superconducting transition temperature. The ferromagnetic contribution to magnetization, estimated at 10%, might be caused by the presence of ferrimagnetic $Fe_7Se_8$, which occupies about 10% of sample volume. From the Andreev spectroscopy we found superconducting energy gap Δ = 2.6 meV at T = 4.2 K, and from magnetization measurements the critical temperature $T_c$ = 15.8 K. The critical current density in magnetic field H = 4 kOe, determined from magnetization measurements, is $j_c$ = (1-2) × 1$0^4$ A/$cm^2$ and weakly depends on magnetic field intensity.
    Źródło:
    Acta Physica Polonica A; 2010, 118, 2; 289-291
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Piecuch Stanisław (13 IV 1907 -- 5 XI 1971), kapitan
    Autorzy:
    Piecuch, Tadeusz.
    Powiązania:
    Kawalerowie Virtuti Militari 1792-1945. T. 3, (1939). Cz. 1 / red. nauk. Bogusław Polak Koszalin, 1997 S. 85
    Współwytwórcy:
    Polak, Bogusław. Redakcja
    Tematy:
    Piecuch Stanisław.
    75 Pułk Piechoty (Wojsko Polskie ; 1918-1939)
    23 Śląska Dywizja Piechoty
    Grupa Operacyjna "Śląsk".
    Grupa Operacyjna "Jagmin".
    Armia "Kraków"
    Oflag II C Woldenberg.
    Opis:
    Adiutant w 75 pp (23 DP z GO "Śląsk", następnie "Jagmin" w Armii "Kraków"). Jeniec oflagu II C Woldenberg (Dobiegniew).
    Dostawca treści:
    Bibliografia CBW
    Artykuł
      Wyświetlanie 1-86 z 86

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