Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "75.47.lx" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-50 z 94
Tytuł:
Barrier and Self-Energy Effects in Manganite Tunneling Characteristics
Autorzy:
Svistunov, V.
Revenko, Y.
Belogolovskii, M.
Gerasimenko, A.
Pashkevich, Y.
Szymczak, H.
Przyslupski, P.
Komissarov, I.
Powiązania:
https://bibliotekanauki.pl/articles/2037099.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
Opis:
Tunneling conductance spectra of point-contact junctions formed by a sharp Ag tip and two optimally doped manganites La$\text{}_{0.67}$Sr$\text{}_{0.33}$MnO$\text{}_{3}$ and Nd$\text{}_{0.67}$ Sr$\text{}_{0.33}$MnO$\text{}_{3}$ are measured and analyzed. It was found that the analytical dependence of the differential conductance on voltage strongly depends on the bias sign and dramatically changes after voltage treatments. The data obtained are explained in terms of the Glasman-Matveev model for tunneling across two localized states settled in the barrier near the manganite bulk. Effective functions of electron-boson interaction extracted from self-energy contributions to the experimental characteristics contain signs of phonon and magnon excitations, higher-energy satellites as a result of possible orbital ordering and a hallmark of localized states in the near-barrier region in the form of strong not-well reproduced peaks.
Źródło:
Acta Physica Polonica A; 2004, 105, 1-2; 87-92
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Elastic Properties of Double-Layered Manganite $La_{1.2}Sr_{1.8-x}Ba_xMn_2O_7$ (x=0.0-0.4)
Autorzy:
Reddy, Y.
Prashanth Kumar, V.
Ramesh, S.
Venkanna, S.
Ramana Reddy, M.
Kistaiah, P.
Vishnuvardhan Reddy, C.
Powiązania:
https://bibliotekanauki.pl/articles/1812358.pdf
Data publikacji:
2008-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
Opis:
The elastic behavior of the sol-gel prepared double-layered manganite system $La_{1.2}Sr_{1.8-x}Ba_xMn_2O_7$ (x = 0.0-0.4) was investigated at 300 K, employing ultrasonic pulse transmission technique at 1 MHz. The values of elastic moduli and acoustic Debye temperature $(θ_D)$ were computed from longitudinal and shear velocities. The measured values were corrected to zero porosity using Hasselman and Fulrath's formula. The elastic constants of the samples, estimated using Modi's heterogeneous metal-mixture rule, were also reported. The variation of elastic moduli with Ba concentration was interpreted in terms of strength of interatomic bonding.
Źródło:
Acta Physica Polonica A; 2008, 113, 6; 1687-1694
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Response of Grained La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$ Films to Microwave Radiation and the Method for Measuring Electrical Resistance of Grains
Autorzy:
Repšas, K.
Laurinavičius, A.
Vaškevičius, R.-A.
Anisimovas, F.
Deksnys, A.
Vengalis, B.
Powiązania:
https://bibliotekanauki.pl/articles/2047104.pdf
Data publikacji:
2006-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.De
Opis:
It was found that the response of grained La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$ films to microwave radiation is of thermal nature. A nonresonant method for measuring of the electric resistance of grains was developed. It allows one to avoid the influence of the magnetic field of the wave on the measurement results. The measurements of the temperature dependences of the grain electric resistance indicate that in the vicinity of the maximum-resistance temperature T$\text{}_{m}$, the intrinsic electric resistance of the grains is more than by two orders of magnitude lower than the film resistance measured by applying the dc current. The obtained experimental results agree well with those given by resonant techniques.
Źródło:
Acta Physica Polonica A; 2006, 110, 4; 537-544
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural Investigations and Magnetic Properties of $BaFe_{12}O_{19}$ Crystals
Autorzy:
Tudorache, F.
Popa, P.
Brinza, F.
Tascu, S.
Powiązania:
https://bibliotekanauki.pl/articles/1490860.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.75.Cd
75.47.Lx
Opis:
This work was dedicated to the preparation of a barium hexaferrite using the glass crystallization method. The glass flakes were treated at temperatures ranging between 550C and 750°C. The investigation carried out by X-ray diffraction revealed the phase composition and the mean crystallite size. By means of the scanning electron microscopy, the crystallite shape and average size were established. The electric and magnetic properties were investigated at room temperature by means of a Solartron 1260A impedance/gain phase analyzer and a vibrating sample magnetometer. The optimum heat treatment was established to obtain the maximum coercivity of the barium hexaferrite.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 95-97
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetization Study of the AFM-FM Coexistence in the Manganite System $Pr_{0.5}Ca_{0.5-x}Sr_xMnO_3$
Autorzy:
Maryško, M.
Jirák, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1813589.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.-d
75.47.Lx
Opis:
For the manganites $Pr_{0.5}Ca_{0.5-x}Sr_xMnO_3$ (x=0;0.3) the temperature and cooling field dependence of the reduced remanence asymmetry indicates the antiferromagnetic exchange between the antiferromagnetic and ferromagnetic spins at the surface of the clusters. For x=0.3 we deduce the radius of the cluster in the field cooled regime to be about 20 times larger than that for x=0.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 143-146
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison between Powders of Strontium Hexaferrite Processed by Dynamic Gas Heat Treatment and Re-Calcination
Autorzy:
Tudorache, F.
Brinza, F.
Popa, P.
Petrila, I.
Grigoras, M.
Tascu, S.
Powiązania:
https://bibliotekanauki.pl/articles/1490859.pdf
Data publikacji:
2012-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Vv
75.47.Lx
Opis:
The utilization of classical ceramic technology for ferrite preparation permits to obtain strontium hexaferrite with big crystals, of micrometer size, with a smaller coercive force than the hexaferrite with submicron crystals. In this work the strontium hexaferrite was obtained with submicron crystals, by hot reduction of the hexaferrite obtained through ceramic technology in CO atmosphere, followed by the thermal re-oxidization in air. The effects of treatment in CO atmosphere and of the re-calcination treatment on the magnetic and electric properties of the strontium hexaferrite were investigated.
Źródło:
Acta Physica Polonica A; 2012, 121, 1; 92-94
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of the Surface Impedance of Conductive Ferromagnetic Films on Different Substrates
Autorzy:
Nurgaliev, T.
Powiązania:
https://bibliotekanauki.pl/articles/1813604.pdf
Data publikacji:
2008-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.70.-i
Opis:
The microwave surface impedance of conductive ferromagnetic films hypothetically deposited on dielectric, metal and superconducting substrates was numerically investigated for the case when the film is tangentially magnetized. It was shown that the surface impedance is governed by the ferromagnetic film conductivity if the film is thin enough. Peculiarities of the impedance caused by the ferromagnetic resonance arise more clearly in thicker ferromagnetic films or in films deposited on substrates of higher permittivity or on metal and superconducting substrates. A ferromagnetic film strongly affects the surface impedance of superconducting material, especially, in the ferromagnetic resonance frequency region.
Źródło:
Acta Physica Polonica A; 2008, 113, 1; 187-190
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Doping on the Structural Distortion of $La_{0.7}Dy_{0.3}Mn_{1-x}Zn_xO_3$
Autorzy:
López, J.
Ríos, M.
Mendoza, G.
Powiązania:
https://bibliotekanauki.pl/articles/1398317.pdf
Data publikacji:
2017-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
61.50.-f
Opis:
Structural properties were studied in the orthorhombic perovskite $La_{0.7}Dy_{0.3}Mn_{1-x}Zn_{x}O_3$, synthesized in the range 0 ≤ x ≤ 0.4. X-ray diffraction data, refined by the Rietveld analysis, shows for x < 0.1 the presence of stretched octahedra on the Mn-O plane, and, for x > 0.1, the existence of elongated octahedra along the c axis. Increased Zn doping causes a direct structural effect: one Zn atom distorts four neighboring MnO₆ octahedra on the Mn-O plane. It was observed that the unit cell volume containing Dy decreases as x increases, whereas the unit cell volume containing La increases as x decreases.
Źródło:
Acta Physica Polonica A; 2017, 131, 5; 1254-1255
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on thermodynamic properties of Fe³⁺-substituted yttrium iron garnets
Autorzy:
Modi, K.
Jha, P.
Raval, P.
Vasoya, N.
Vyas, K.
Meshiya, U.
Gohil, R.
Jadav, K.
Gohil, N.
Sharma, P.
Powiązania:
https://bibliotekanauki.pl/articles/1158494.pdf
Data publikacji:
2016-09
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
05.70.-a
Opis:
This paper presents the molar heat capacity at constant volume C_{V} and characteristic Debye temperature θ, determination for the garnet system, Y_{3-x}Fe_{5+x}O_{12}, x=0.0, 0.1, 0.3, and 0.5 at 300 K. The θ values determined from Waldron's approach and those calculated using ultrasonic mean sound velocity, V_{mo}, are in agreement. C_{V} values calculated from the Einstein theory are consistent with the reported one and theoretically expected values using the Dulong-Petit law, but Waldron's approach based on the Debye theory and the Debye T³ law fail to estimate consistent C_{V} values. The result has been discussed in the light of key physical differences between the two theories. The applicability of the Kieffer model for molar heat capacity at constant pressure, C_{p}, determination has been tested. Finally, an attempt has been made to estimate electronic contribution and the temperature at which the lattice contribution and electronic contribution to the molar heat capacity become comparable.
Źródło:
Acta Physica Polonica A; 2016, 130, 3; 778-784
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
XANES Study of La$\text{}_{0.75-x}$Gd$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3-δ}$ Solid Solutions
Autorzy:
Drozd, V. A.
Pęka̶a, M.
Liu, R. S.
Lee, J.-F.
Chen, J. M.
Powiązania:
https://bibliotekanauki.pl/articles/2046755.pdf
Data publikacji:
2006-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
61.10.Ht
Opis:
A series of solid solutions La$\text{}_{0. 75-x}$Gd$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3-δ}$ with 0.0≤x≤0.75 was prepared via carbonate precursor precipitation method. Final sintering was performed at 1250ºC in oxygen flow atmosphere. The samples obtained were characterized by scanning electron microscope, X-ray diffraction measurements. Oxygen stoichiometry was analyzed by iodometric titration method. X-ray absorption spectroscopic methods of Mn L-edge and Mn K-edge X-ray absorption near edge structure were used to study oxidation state of manganese in the solid solutions and elucidate features of their local crystal structure. Orthorhombic crystal structure characteristics of the solid solutions were refined by Rietveld method. An increase in oxygen deficiency and average manganese oxidation state were found to accompany Gd concentration increase in La$\text{}_{0.75-x}$Gd$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3-δ}$. These results are consistent with Mn L-edge X-ray absorption near edge structure spectra, where a gradual change of Mn oxidation state with Gd concentration increase was detected. Origins of oxygen deficiency La$\text{}_{0.75- x}$Gd$\text{}_{x}$Ca$\text{}_{0.25}$MnO$\text{}_{3-δ}$ are discussed in terms of structural disorder caused by Gd substitution for La.
Źródło:
Acta Physica Polonica A; 2006, 109, 4-5; 583-589
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural, Thermal, Magnetic, and Transport Properties of (La$\text{}_{2}\text{}_{/}\text{}_{3}$ Ca$\text{}_{1}\text{}_{/}\text{}_{3}$ )(Mn$\text{}_{1-x}$Sn$\text{}_{x}$)O$\text{}_{3-δ}$ Compounds
Autorzy:
Przewoźnik, J.
Chmist, J.
Kolwicz-Chodak, L.
Tarnawski, Z.
Kołodziejczyk, A.
Krop, K.
Kellner, K.
Gritzner, G.
Powiązania:
https://bibliotekanauki.pl/articles/2038395.pdf
Data publikacji:
2004-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
75.40.Cx
Opis:
The structural, magnetic, and electrical transport properties of Sn-doped manganite La$\text{}_{0.67}$Ca$\text{}_{0.33}$Mn$\text{}_{1-x}$ Sn$\text{}_{x}$O$\text{}_{3-δ}$ (x=0, 0.01, 0.03, andδ≈0.06) compounds were studied using X-ray powder diffraction, scanning electron microscopy, AC susceptometer and vibrating sample magnetometer measurements as well as four-probe resistance measurements. The specific heat was measured by the heat-pulse method. The Curie temperature T$\text{}_{C}$ and the metal-insulator transition temperature T$\text{}_{M-I}$ decreased nonlinearly with increasing Sn content. The T$\text{}_{C}$ and T$\text{}_{M-I}$ values, for the x=0, 0.01, and 0.03 compounds were separated by 18.2 K, 66.3 K, and 10 K, respectively. The resistivity above T$\text{}_{C}$ for all of these compounds followed the Mott variable-range-hopping model. This allowed the estimation of the localization lengths of 2.2Å (x = 0), 1.33Å (x=0.01) and 1.26Å (x=0.03). The x=0 and x=0.01 compounds exhibited anomalies of R(T) at corresponding T$\text{}_{C}$ and allowed the separation of the magnitude of the purely magnetic contribution to the resistance which for x=0 was≈5 .7Ω and for x=0.01,≈22 .4Ω. The specific heat of the Sn-free sample exhibited a sharp peak at T$\text{}_{C}$. With increasing Sn content the peak at T$\text{}_{C}$ broadened and the area under the peak decreased. For x= 0.03 the peak was hardly detectable. Our results on La$\text{}_{0.67}$Ca$\text{}_{0.33}$ Mn$\text{}_{1-x}$Sn$\text{}_{x}$O$\text{}_{3}$ reveal that a small substitution of Sn$\text{}^{4+}$ for Mn$\text{}^{4+}$ suppresses double exchange interactions and strongly affects the magnetic, thermal, and transport properties of the parent compound.
Źródło:
Acta Physica Polonica A; 2004, 106, 5; 665-680
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth and Investigation of Oxide Heterostructures Based on Half-Metallic Fe$\text{}_{3}$O$\text{}_{4}$
Autorzy:
Vengalis, B.
Šliužienė, K.
Lisauskas, V.
Powiązania:
https://bibliotekanauki.pl/articles/2038160.pdf
Data publikacji:
2004-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
We report thin films of ferromagnetic Fe$\text{}_{3}$O$\text{}_{4}$ (magnetite) grown by a reactive magnetron sputtering at T=300÷450°C on lattice-matched MgO, and bilayer structures composed of Fe$\text{}_{3}$O$\text{}_{4}$ and underlying epitaxial films of highly conductive electron-doped In$\text{}_{2}$O$\text{}_{3}$〈Sn〉, LaNiO$\text{}_{3}$, and antiferromagnetic CoO. The prepared Fe3O4/MgO films and the bilayer structures demonstrated clearly defined resistance anomaly at Verwey transition point (T$\text{}_{V}$≈100-120 K). Formation of high resistance interlayer was indicated between the adjacent conducting Fe3O4 and LaNiO3 layers. However, relatively low interface resistivity of about 0.1 Ω cm$\text{}^{2}$ (at T=300 K) was estimated for the patterned Fe3O4/In2O3〈Sn〉 bilayer structures. Vertical electrical transport measurements revealed strong nonlinearity in the I-U dependences of the Fe3O4/In2O3 〈Sn〉 interface at T
Źródło:
Acta Physica Polonica A; 2004, 105, 6; 659-665
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Frequency Dependence of Electrical Response of Polycrystalline LCMO Thin Films
Autorzy:
Ašmontas, S.
Anisimovas, F.
Balevičius, S.
Cimmperman, P.
Gradauskas, J.
Lučun, A.
Stankevič, V.
Sužiedėlis, A.
Vengalis, B.
Žurauskienė, N.
Powiązania:
https://bibliotekanauki.pl/articles/2041721.pdf
Data publikacji:
2005-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
Influence of strong electric field in wide frequency range (from DC to 35 GHz) on electrical resistance of thin La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$ polycrystalline manganite films was investigated in the range of (78÷300) K. Different behavior of resistance change vs. temperature was observed when pulsed DC electric field and microwaves were applied to the films. When pulsed DC electric field is applied the electric-field-induced resistance change ("electroresistance") of manganite film depended nearly monotonically on temperature. However, in microwave electric fields a non-monotonic character of the electroresistance temperature dependence was observed. The dependence of the electroresistance on quality of manganite films was observed in case of microwaves. The experimental findings are explained assuming different electrical current mechanisms in case of DC and microwave fields. The applied voltage drops mainly across the grains of polycrystalline film due to a presence of displacement currents in case of microwaves, whereas in DC case the voltage drop is across the grain boundaries.
Źródło:
Acta Physica Polonica A; 2005, 107, 1; 193-197
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Novel Properties of Atomically Arranged Perovskites
Autorzy:
Dabrowski, B.
Kolesnik, S.
Chmaissem, O.
Suescun, L.
Mais, J.
Powiązania:
https://bibliotekanauki.pl/articles/2047207.pdf
Data publikacji:
2007-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
61.12.Ld
Opis:
Perovskites AMO$\text{}_{3-δ}$ attain unique electronic, magnetic, ferroelectric, thermoelectric, mixed-conducting, and other functional properties through selection of the A- and M-site ions, their fractions, ionic sizes and valences, spin states, and orbital orderings, as well as the oxygen content and vacancy ordering. We illustrate here our systematic exploration of the effects of composition, temperature, pressure, and oxygen content on the thermodynamic stability and magnetic properties for La$\text{}_{1-x-y}$Sr$\text{}_{x}$Ba$\text{}_{y}$MnO$\text{}_{3}$ manganites. Parameters controlling magnetic transitions are identified through examples of single-valent compounds of RMnO$\text{}_{3}$ (the Mn-O-Mn bond angles that can be equivalently described in terms of the tolerance factor) and Sr$\text{}_{1-x}$Ca$\text{}_{x}$MnO$\text{}_{3}$ (the tolerance factor and disorder described in terms of the variance of A-site ion sizes), and the mixed-valent La$\text{}_{0.5}$Sr$\text{}_{0.5-y}$Ba$\text{}_{y}$MnO$\text{}_{3}$ (the tolerance factor, variance of sizes, and the local strains described in terms of the elongated Mn-O bonds). By using an example of kinetically stable, atomically-ordered layered-perovskites we show that improved useful properties, such as the increase in the Curie temperature T$\text{}_{C}$ and enhancement of colossal magneto-resistive effect at room temperature, can be achieved through decreases in structural distortions such as variance of sizes and local strains.
Źródło:
Acta Physica Polonica A; 2007, 111, 1; 15-25
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reversible Resistive Switching in Electrically Nonhomogeneous $La_{0.67}Ca_{0.33}MnO_3$ Thin Films by Short Electrical Pulses
Autorzy:
Lučun, A.
Kiprijanovič, O.
Ašmontas, S.
Anisimovas, F.
Maneikis, A.
Sužied.lis, A.
Vengalis, B.
Powiązania:
https://bibliotekanauki.pl/articles/1813407.pdf
Data publikacji:
2008-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
Resistance changes in thin electrically nonhomogeneous $La_{0.67}Ca_{0.33}MnO_3$ films were investigated using electrical pulses of nanosecond duration in the 80-300 K temperature range. Two types of reversible switching to higher resistive states with different starting temperature induced by series of the positive pulses were observed. Possible mechanisms of the resistance switching by short electrical pulses in the vicinity of $T_m$ and at 80-90 K are discussed.
Źródło:
Acta Physica Polonica A; 2008, 113, 3; 1059-1062
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Laser Induced Self-Organization of Nanohills/Nanowires in $SiO_2$/Si Interface
Autorzy:
Medvid, A.
Onufrijevs, P.
Dmitruk, I.
Pundyk, I.
Powiązania:
https://bibliotekanauki.pl/articles/1813410.pdf
Data publikacji:
2008-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
The aim of this work is to study optical properties of self-organized Si nanohills formed on the $SiO_2$/Si interface after pulsed Nd:YAG laser irradiation. Nanohills on Si surface give strong photoluminescence in the visible range of spectrum, with a long wing in red portion. This property is explained by charge carrier quantum confinement in nanohills/nanowires.
Źródło:
Acta Physica Polonica A; 2008, 113, 3; 1067-1070
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Fast Electrical Switching of Thin Manganite Films
Autorzy:
Balevičius, S.
Kiprijanovič, O.
Stankevič, V.
Žurauskienė, N.
Česnys, A.
Tolvaišienė, S.
Abrutis, A.
Plaušinaitienė, V.
Powiązania:
https://bibliotekanauki.pl/articles/1813192.pdf
Data publikacji:
2008-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
73.50.Fq
Opis:
The effects of strong pulsed electric field on the electrical properties of thin epitaxial $La_{0.7}Sr_{0.3}MnO_3$ films were investigated. The fast electrical switching from high resistance off-state to low resistance on-state was obtained at current densities higher than $10^6 A//cm^2$. This current was able to induce an irreversible damage of the sample in the regions at the edges of the electrodes of the film. It was demonstrated that thermal effects are responsible for appearance of delay time and asymmetrical shape of current channel in on-state, however, the fast switching from off- to on-state is a result of electronic effects appearing when critical power is reached in the film.
Źródło:
Acta Physica Polonica A; 2008, 113, 3; 821-824
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High Energy Laser Systems for Short Range Defense
Autorzy:
Lavan, M.
Powiązania:
https://bibliotekanauki.pl/articles/1807852.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
73.50.Fq
Opis:
The advantages of the use of high energy laser systems in a counter rocket, artillery and mortar projectile mission are described. The history of the development of directed energy weapons in the United States Army and the current high energy laser programs and technologies are outlined. The U.S. Army vision for future ground combat relies on high mobility, lightweight systems with improved survivability. Without the protection afforded by heavy armor, other methods for protecting assets and personnel are required. The Army is now developing the technologies for a future mobile solid state laser weapon system to defeat a wide range of air and ground threats, working to get these revolutionary weapons to our soldiers in the near future.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 959-963
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Explosive Pulsed Power: An Enabling Technology
Autorzy:
Altgilbers, L.
Powiązania:
https://bibliotekanauki.pl/articles/1807903.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
73.50.Fq
Opis:
Explosive pulsed power consists of those devices that convert the chemical energy in explosives into electrical energy. In 2004, a series of programs were initiated to develop several types of very compact explosive pulsed power generators. Based on these recent efforts, we now have a better understanding of the weaknesses and strengths of these small generators. As a result, we can now build reliable generators that provide consistent output currents and voltages. In this paper, a brief introduction to these generators will be given along some of the most recent advances in our understanding of them. A description of an explosive driven high power microwave test bed being built at Texas Tech will be presented. This test bed can be used to test the effects of electromagnetic radiation on electronics. A brief description of some applications of explosive pulsed power will also be presented.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1040-1043
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Development of Carbon Nanotube Based Reflection Type X-ray Source
Autorzy:
Choi, H.
Kim, J.
Lee, C.
Powiązania:
https://bibliotekanauki.pl/articles/1807922.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
73.50.Fq
Opis:
X-ray imaging technology is a useful and leading medical diagnostic tool for health care professionals to diagnose disease in human body. Carbon nanotube based X-ray source, which we have developed in this study, could be also useful and supply integrated diagnostic X-ray imaging tool in diagnosis. Conventionally, thermionic type of tungsten filament X-ray tube is widely employed in the field of biomedical and industrial application fields. However, intrinsic problems, such as poor emission efficiency, low imaging resolution, and high electrical energy consumption etc., may cause the limitation of using the X-ray tube. To fulfill the current market requirement, specifically for medical diagnostic field, we have developed rather a portable and compact carbon nanotube based X-ray device in which microfocus high imaging resolution can be feasible.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1078-1080
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thin Film Manganite-Metal Interconnection and "Loop Effect" Studies in CMR-Based High Magnetic Field Sensors
Autorzy:
Balevičius, S.
Stankevič, V.
Žurauskienė, N.
Šimkevičius, Č.
Liebfried, O.
Löffler, M.
Schneider, M.
Abrutis, A.
Plaušinaitienė, V.
Powiązania:
https://bibliotekanauki.pl/articles/1807946.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
85.70.Ay
Opis:
The design, technology and main characteristics of Ag contacts as well as "loop effect" peculiarities of colossal magnetoresistance B-scalar high magnetic field sensor based on $La_{1-x}(Ca)Sr_x$ $MnO_3$ films used for measuring high magnetic field pulses are presented.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1133-1135
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electric Field Distributions in the Open Cylindrical Silicon Carbide Waveguides
Autorzy:
Asmontas, S.
Nickelson, L.
Gric, T.
Powiązania:
https://bibliotekanauki.pl/articles/1807970.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
73.50.Fq
Opis:
Here are presented the results of an electrodynamical analysis of the SiC waveguides with two different radii R=1.5 mm and R=2.5 mm. We have investigated the dispersion characteristics of these waveguides as well as the electric field distributions in the waveguide cross-sections at f=50 and 25 GHz.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1160-1161
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
La$\text{}_{0.7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ Thin-Film Grain-Boundary Junctions on a Bi-Crystal Substrate
Autorzy:
Gierłowski, P.
Szewczyk, A.
Abal'oshev, A. V.
Vlakhov, E. S.
Donchev, T. I.
Blagoev, B.
Powiązania:
https://bibliotekanauki.pl/articles/2041462.pdf
Data publikacji:
2004-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.47.Gk
72.25.Mk
Opis:
Transport properties of 10μm to 30μm wide grain-boundary junctions ion-etched in thin colossal magnetoresistance La$\text{}_{0. 7}$Sr$\text{}_{0.3}$MnO$\text{}_{3}$ films deposited on a SrTiO$\text{}_{3}$ bi-crystal were investigated. We have measured the current-voltage characteristics in the temperature range from 4.2 K to 300 K without applied magnetic field, as well as the magnetoresistance at magnetic fields up to±10 kOe directed parallel to the film surface, both perpendicular and parallel to the direction of current flow through the junctions. The investigated junctions have nonlinear current-voltage characteristics in this temperature range and consist of several magnetic domains. The maximum magnetoresistance (R(H)-R $\text{}_{max}$)/R$\text{}_{max}$, measured at 1 kOe was -17.6% at 4.1 K.
Źródło:
Acta Physica Polonica A; 2004, 106, 5; 715-719
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Phase Separation and Microwave Response of Epitaxial and Polycrystalline Manganite Films
Autorzy:
Ašmontas, S.
Abrutis, A.
Gradauskas, J.
Lučun, A.
Oginskis, A.
Plaušinaitienė, V.
Sužiedėlis, A.
Vengalis, B.
Powiązania:
https://bibliotekanauki.pl/articles/2037115.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
The resistance, magnetoresistance, and resistance response under microwave irradiation (f=10 and 35 GHz) were measured for epitaxial and polycrystalline La$\text{}_{0.67}$Ca$\text{}_{0.33}$MnO$\text{}_{3}$ and La$\text{}_{0.67}$Sr$\text{}_{0.33}$MnO$\text{}_{3}$ thin films in the temperature range 78÷300 K. The microwave induced resistance increase observed for the epitaxial films in a narrow temperature range below the ferromagnetic to paramagnetic transition temperature T$\text{}_{c}$ certifies coexistence of low resistance (ferromagnetic) and high resistance (paramagnetic) regions in the manganites. Resistance of polycrystalline films decreased under microwave irradiation in a wide temperature range below T$\text{}_{c}$. The effect was explained in terms of microwave assisted hopping of carriers in high resistance regions formed at grain boundaries of the polycrystalline films.
Źródło:
Acta Physica Polonica A; 2004, 105, 1-2; 141-147
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetoresistance of Polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ Films in a Microwave Magnetic Field
Autorzy:
Lučun, A.
Butkutė, R.
Maneikis, A.
Kiprijanovič, O.
Anisimovas, F.
Gradauskas, J.
Sužiedėlis, A.
Vengalis, B.
Kancleris, Ž.
Ašmontas, S.
Powiązania:
https://bibliotekanauki.pl/articles/2047240.pdf
Data publikacji:
2007-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
07.57.Kp
Opis:
We present new experimental evidence indicating the importance of magnetic field component of microwave field (f=9.4 GHz) for magnetoresistive properties of polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ films. The microwave measurements revealed a different character of the temperature-dependent electrical resistance of polycrystalline La$\text{}_{0.7}$Ca$\text{}_{0.3}$MnO$\text{}_{3}$ films placed in the centre (maximal amplitude of H$\text{}_{10}$ wave vector) and at a narrow wall of the wave-guide (reduced H$\text{}_{10}$ amplitude). Theoretical estimations of the influence of substrate onto distribution of microwave electric and magnetic fields in the waveguide were performed using the finite-difference time-domain method.
Źródło:
Acta Physica Polonica A; 2007, 111, 1; 147-152
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ordered Phases and Magnetic Excitations in Doped Manganites
Autorzy:
Sikora, O.
Oleś, A.M.
Powiązania:
https://bibliotekanauki.pl/articles/2038394.pdf
Data publikacji:
2004-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.30.Ds
75.50.Ee
Opis:
We present theoretical models concerning magnetic and charge ordering in half-doped manganites. The new approach to microscopic description of this group of compounds, taking into consideration the oxygen degrees of freedom, is discussed. The spin wave dispersion relations are shown both in the model of effective spins on Mn ions and in the new approach when two Mn ions form a large effective spin S=7/2.
Źródło:
Acta Physica Polonica A; 2004, 106, 5; 659-664
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Giant Magnetocaloric Effect in Manganites
Autorzy:
Szymczak, R.
Kolano, R.
Kolano-Burian, A.
Dyakonov, V.
Szymczak, H.
Powiązania:
https://bibliotekanauki.pl/articles/1550566.pdf
Data publikacji:
2010-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.30.Sg
75.40.Cx
Opis:
In this review we briefly discuss the magnetocaloric properties of the manganites. It is evidenced that the maximum entropy change observed in manganites exceeds that of gadolinium (the prototype material for room temperature refrigerators). For the manganites characterized by second-order magnetic phase transitions the scaling hypothesis is discussed. It is shown that simple phenomenological model with only one fitting parameter, presented in this paper, satisfactorily describes experimental observations.
Źródło:
Acta Physica Polonica A; 2010, 117, 1; 203-206
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetocaloric Effect in $La_{0.8}Sr_{0.2}MnO_{3}$ Film
Autorzy:
Szymczak, R.
Dyakonov, K.
Radelytskyi, I.
Dyakonov, V.
Szymczak, H.
Powiązania:
https://bibliotekanauki.pl/articles/1402317.pdf
Data publikacji:
2015-07
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Sg
75.47.Lx
75.70.Ak
Opis:
Thin epitaxial film of $La_{0.8}Sr_{0.2}MnO_{3}$ has been deposited on yz-cut $LiNbO_{3}$ by pulsed laser ablation. The film was characterized by X-ray diffraction and magnetic measurements as a single phase. The magnetic properties and the magnetocaloric effect have been measured as a function of magnetic field and temperature. A reasonably high magnetocaloric effect indicates that this film might provide an efficient material for micro magnetic refrigerators.
Źródło:
Acta Physica Polonica A; 2015, 128, 1; 56-58
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Field Induced Unusual Magnetic Behavior at Low Temperature in $Pr_{0.67}Ca_{0.33}MnO_3$
Autorzy:
Pektas, M.
Gencer, H.
Izgi, T.
Kolat, V.
Atalay, S.
Powiązania:
https://bibliotekanauki.pl/articles/1207723.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.30.Kz
75.30.Sg
Opis:
In this study, magnetic properties of $Pr_{0.67}Ca_{0.33}MnO_3$ compound were investigated in detail. The magnetization versus temperature (M-T) curve showed that this material undergoes a charge order transition at 200 K. A more pronounced FM phase appeared below 56 K. At T = 5 K, a field induced sharp step like magnetisation transition associated with phase separation was observed. However, after application of 7 T magnetic field at 5 K, the magnetic behaviour of sample was changed completely and full FM behaviour was observed. The more interesting is that the sample remains in the FM state and does not retrieve the initial magnetic state until warmed up to charge order transition temperature. Large negative magnetic entropy change (- 26.18 J/(kg K) at 38 K and 5 T) was attributed to step like magnetisation transition.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 217-219
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Pressure on Magnetic Properties of $(NH_3OH)_2CoF_4$ Fluoro-Metal Complex
Autorzy:
Jagličić, Z.
Zentková, M.
Mihalik, M.
Drofenik, M.
Kristl, M.
Dojer, B.
Kasunič, M.
Golobič, A.
Jagodič, M.
Arnold, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1535548.pdf
Data publikacji:
2010-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.30.Cr
75.30.Kz
Opis:
Effect of pressure on magnetic properties of a bulk fluoro-metal complex $(NH_3OH)_2MF_4$ was studied. Magnetization measurements suggest that a ferromagnetic transition at $T_{C1}$ = 47 K is followed by a ferrimagnetic one at $T_{C2}$ = 3 K. Both transition temperatures are pressure dependent with the pressure coefficients $dT_{C1}$/ dp = - 2.6 K/GPa and $dT_{C2}$/ dp = 0.26 K/GPa. The opposite sign of the coefficients is an additional indication of a different nature (ferromagnetic/antiferromagnetic) of these two transitions. The effect of pressure on low field magnetization and exchange bias phenomena is small but still visible.
Źródło:
Acta Physica Polonica A; 2010, 118, 5; 1074-1075
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Properties of Mn-Doped Amorphous $SiO_2$ Matrix
Autorzy:
Milivojević, D.
Babić-Stojić, B.
Jokanović, V.
Jagličić, Z.
Makovec, D.
Powiązania:
https://bibliotekanauki.pl/articles/1503690.pdf
Data publikacji:
2011-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.50.Lk
75.47.Lx
75.50.Tt
Opis:
Samples of Mn-doped amorphous $SiO_2$ matrix with manganese concentration 0.7 and 3 at.% have been prepared by a sol-gel method. Transmission electron microscopy analysis has shown that the samples contain agglomerates of amorphous silica particles 10 - 20 nm in size. Two types of Mn-rich particles are dispersed in silica matrix, smaller nanoparticles with dimensions between 3 and 10 nm, and larger crystalline areas consisting of aggregates of the smaller nanoparticles. High-temperature magnetic susceptibility reveals that dominant magnetic phase at higher temperatures is $λ-MnO_2$. At temperatures below $T_{C}$=43 K strong ferrimagnetism originating from the minor $Mn_3O_4$ phase masks the relatively weak magnetism of $λ-MnO_2$. Magnetic field dependence of the maximum in the zero-field-cooled magnetization for both the samples in the vicinity of 40 K, and a frequency shift of the real component of the AC magnetic susceptibility in the sample with 3 at.% Mn suggest that the magnetic moments of the smaller $Mn_3O_4$ nanoparticles with dimensions below 10 nm are subject to thermally activated blocking process just below the Curie temperature $T_{C}$. The low-temperature maximum in the zero-field-cooled magnetization observed for both the samples below 10 K indicates possible spin glass freezing of the magnetic moments in the geometrically frustrated Mn sublattice of the $λ-MnO_2$ crystal structure.
Źródło:
Acta Physica Polonica A; 2011, 120, 2; 316-321
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect on Highly Cr-Substituted Manganite Nd$\text{}_{0.6}$C a$\text{}_{0.4}$(Mn$\text{}_{0.5}$Cr$\text{}_{0.5}$)O$\text{}_{3}$
Autorzy:
Gamari-Seale, H.
Troyanchuk, I. O.
Bushinsky, M. V.
Stefanopoulos, K. L.
Hernandez-Velasco, J.
Powiązania:
https://bibliotekanauki.pl/articles/2037098.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.25.+z
75.30.Kz
75.47.Lx
Opis:
Neutron powder-diffraction experiments on the highly Cr-substituted manganite, Nd$\text{}_{0.6}$Ca$\text{}_{0.4}$(Mn$\text{}_{0.5}$Cr$\text{}_{0.5}$)O$\text{}_{3}$, at different temperatures and fields reveal that the structure retains the charge exchange-type of the parent compound, Nd$\text{}_{0.6}$Ca$\text{}_{0.4}$MnO$\text{}_{3}$. It is antiferromagnetic below 200 K and becomes a canted antiferromagnet below 50 K. The Mn and Cr form zig-zag ferromagnetic chains coupled antiferromagnetically in the ac-plane. These are stacked along the b-axis with opposite spins.
Źródło:
Acta Physica Polonica A; 2004, 105, 1-2; 81-86
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetoelastic Properties of La$\text{}_{0.744}$Ba$\text{}_{0.186}$MnO$\text{}_{3}$ Single Crystals
Autorzy:
Bukhantsev, Yu.
Mukovskii, Ya. M.
Vasiliev, S.
Kundys, B.
Szymczak, H.
Powiązania:
https://bibliotekanauki.pl/articles/2037121.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.30.Gw
75.80.+q
Opis:
Magnetoelastic properties of La$\text{}_{0.744}$Ba$\text{}_{0.186}$MnO$\text{}_{3}$ single crystals have been studied. The basic magnetoelastic constants of the crystal have been estimated using the data of magnetostriction and magnetization measurements, which have been carried out in [010] and [110] crystallographic directions in a wide temperature range from 10 K to 150 K. The anomaly of the thermal expansion has been observed at about 185 K. Near this anomaly two almost degenerated phase transitions have been observed. One of these transitions may be related to the structural phase transition, while the second one to the occurrence of spontaneous strains. The magnetostriction of La$\text{}_{0.744}$ Ba$\text{}_{0.186}$MnO$\text{}_{3}$ single crystal seems to arise due to the effect of applied field on the spontaneous strains.
Źródło:
Acta Physica Polonica A; 2004, 105, 1-2; 155-162
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Orbital Correlations in Monolayer Manganites - From Spin t-J Model to Orbital t-J Model
Autorzy:
Daghofer, M.
Oleś, A. M.
Powiązania:
https://bibliotekanauki.pl/articles/2047308.pdf
Data publikacji:
2007-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.10.Jm
75.30.Et
75.47.Lx
Opis:
On the example of monolayer manganites we show that the theoretical ideas developed long ago along the derivation of the spin t-J model from the Hubbard model are nowadays very helpful in strongly correlated oxides with partly filled degenerate orbitals. We analyze a realistic orbital t-J model for e$\text{}_{g}$ electrons in La$\text{}_{1-x}$Sr$\text{}_{1+x}$MnO$\text{}_{4}$ monolayer manganites, and discuss the evolution of spin and orbital correlations under increasing doping by performing exact diagonalization of finite clusters, with electronic kinetic energy determined self-consistently at a finite temperature by classical Monte Carlo for t$\text{}_{2g}$ spins. Several experimental results are reproduced.
Źródło:
Acta Physica Polonica A; 2007, 111, 4; 497-512
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Orbital Correlations and Magnetic Phase Transitions in Lightly Doped La$\text{}_{0.88}$MnO$\text{}_{x}$ and LaMn$\text{}_{0.94}$O$\text{}_{y}$ Manganites
Autorzy:
Troyanchuk, I. O.
Khomchenko, V. A.
Tovar, M.
Szymczak, H.
Bärner, K.
Powiązania:
https://bibliotekanauki.pl/articles/2037044.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Kz
75.47.Lx
61.50.Ks
Opis:
The results of X-ray and neutron diffraction study as well as the elastic, magnetic, and electrotransport properties of La$\text{}_{0.88}$MnO$\text{}_{x}$ (2.82≤ x≤2.96) and LaMn$\text{}_{0.94}$O$\text{}_{y}$ (2.91≤ y≤3.00)$ manganites have been presented. Under oxygen doping, the transitions from antiferromagnetic to ferromagnetic or spin-glass state are observed for La-deficient and La-excessive series, respectively. These transitions have been found to correlate with the change of the type of Jahn-Teller distortions from static to dynamic ones. The dynamic orbital correlations favor a ferromagnetic state, while an A-type antiferromagnetic state is typical of the static Jahn-Teller distortions. It is argued that the canting magnetic structure in manganites is not realized. The transition to a ferromagnetic or spin-glass state occurs via the formation of inhomogeneous state with different types of orbital correlations and magnetic structure. The key role of intrinsic chemical inhomogeneity in the formation of inhomogeneous magnetic states in solid solutions of manganites is emphasized.
Źródło:
Acta Physica Polonica A; 2004, 105, 1-2; 27-44
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mesoscopic Ordering Effects in Single-Crystalline Thin Films of Lanthanum Manganites
Autorzy:
Samoilenko, Z. A.
Okunev, V. D.
Pushenko, E. I.
Abal'oshev, A.
Baran, M.
Gierłowski, P.
Lewandowski, S. J.
Szymczak, R.
Powiązania:
https://bibliotekanauki.pl/articles/2037100.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Kz
75.47.Lx
61.50.Ks
Opis:
We have investigated thin films of lanthanum manganites epitaxially grown by pulsed laser deposition on single-crystalline substrates. X-ray diffraction studies show that the characteristic feature of the investigated films is a superposition of fractions with long range atomic order in the basic single-crystalline matrix, and mesoscopic order in the clusterized structure encompassing the Mn-O layers. A detailed analysis of diffusive scattering shows that the size of metallic clusters and their volume concentration in the dielectric matrix varies. In the case of a small size and concentration, the metallic clusters in low temperature behave as quantum dots and their presence leads to a tunneling mechanism of conductivity with characteristic R(T)= const. In the case of large cluster size, the discrete energy levels become smeared. It appears also that the optical, transport, and magnetic properties of the investigated films depend critically on the distribution of Mn$\text{}^{2+}$, Mn$\text{}^{3+}$, and Mn$\text{}^{4+}$ ions in the clusters.
Źródło:
Acta Physica Polonica A; 2004, 105, 1-2; 93-98
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic Measurement Station for Ferrite Materials Testing
Autorzy:
Charubin, T.
Nowak, P.
Nowicki, M.
Szewczyk, R.
Urbański, M.
Powiązania:
https://bibliotekanauki.pl/articles/1031017.pdf
Data publikacji:
2018-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.60.Ej
75.47.Lx
52.70.Ds
Opis:
The paper presents automatic and modular measurement station for the magnetic materials testing. It allows for measurements of magnetic hysteresis loops under various regimes (sine, triangle or arbitrary magnetizing field, sine or triangle magnetic flux density) and relative permeability curves. The modular nature of the system allows for measurements of magnetic parameters under additional external influences, such as temperature and stress. The system is currently used for measurements of ferrite materials parameters.
Źródło:
Acta Physica Polonica A; 2018, 133, 4; 1049-1052
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Multiband d-p Model for the Description of Sr₂RuO₄
Autorzy:
Rościszewski, K.
Oleś, A.
Powiązania:
https://bibliotekanauki.pl/articles/1385178.pdf
Data publikacji:
2015-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.25.Dk
75.47.Lx
71.70.Ej
Opis:
We study electronic structure of multiband d-p model describing RuO₄ layer such as realized in Sr₂RuO₄. The model takes into account nearest-neighbor anisotropic ruthenium-oxygen and oxygen-oxygen hoppings, intra-atomic Coulomb interaction, Hund's exchange and in addition spin-orbit coupling on ruthenium. The RuO₄ is universally considered as a pure $t_{2g}$ system (with $e_{g}$ orbitals empty) due to sizable gap between $t_{2g}$ and $e_{g}$ levels. We show that ruthenium $e_{g}$ orbitals are in fact occupied, similarly like showed earlier for CoO₂ layers.
Źródło:
Acta Physica Polonica A; 2015, 127, 2; 260-262
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Neglect of Local Coulomb Interaction on Oxygens in Perovskites Described by the Multiband d-p Model
Autorzy:
Rościszewski, K.
Oleś, A.
Powiązania:
https://bibliotekanauki.pl/articles/1029759.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.15.-m
75.25.Dk
75.47.Lx
Opis:
On the example of TiO₄ layer (such as realized in Sr₂TiO₄) we study electronic structure of multiband d-p models describing transition metal perovskites. As suggested by experiment, the studied system is predicted to be a robust nonmagnetic insulator. A realistic treatment of electronic structure requires one to introduce non-zero Coulomb local interactions at 2p oxygen orbitals. However, up till now majority of papers based upon multiband models made an approximation of neglecting such interactions. We show that this simplification does not lead to serious problems in predictions of the electronic structure provided the Coulomb interactions at titanium ions and charge transfer gap are suitably renormalized (so they become entirely different with respect to the true microscopic d-p model parameters).
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 356-358
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Temperature Influence on the Functional Properties of Inductive Components with Mn-Zn Ferrite Cores
Autorzy:
Jackiewicz, D.
Kachniarz, M.
Bieńkowski, A.
Powiązania:
https://bibliotekanauki.pl/articles/1030884.pdf
Data publikacji:
2018-04
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
84.30.Jc
75.47.Lx
75.50.Gg
Opis:
The paper presents the results of investigation of the temperature influence on the inductance and power losses in ferrite cores. Such effect can significantly influence the utility parameters of electronic devices, particularly in precision equipment. For example slight parameter change in this type of components in measuring devices can cause significant changes in output parameters. It is also equally important for mobile devices where increase of losses can limit the duration of service. Special measurement system composed of hysteresis graph, cryostat and PC was utilized to perform the experiment. The cores used during the investigation had closed magnetic circuit. In order to perform measurements of magnetic properties of the material, two sets of windings (magnetizing and sensing) were made on each core. The cores were placed in a cryostat, which was used to set the temperature value within the range from -20 to +50°C. The magnetic properties were measured by the hysteresis graph, to assess the influence of the temperature on the functional parameters.
Źródło:
Acta Physica Polonica A; 2018, 133, 4; 1038-1040
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production of $LaCaMnO_3$ Composite by Ball Milling
Autorzy:
Gencer, H.
Cengiz, N.
Kolat, V.
Izgi, T.
Atalay, S.
Powiązania:
https://bibliotekanauki.pl/articles/1207685.pdf
Data publikacji:
2014-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
81.20.Ev
75.47.Lx
75.30.Sg
Opis:
$La_{0.67}Ca_{0.33}MnO_3$ perovskite-type manganite was synthesized by high-energy ball milling raw oxides of $La_2O_3$ (purity 99.9%), $CaCO_3$ (purity > 99%), and MnO (purity > 99%). The ratio of ball and powder weight was 10:1 and the rotating speed was set to 500 rpm. X-ray analysis indicated that $La_{0.67}Ca_{0.33}MnO_3$ single phase was formed completely when milling time is up to 4 h. The peak intensity of perovskite structure decreased and a hump-like peak appeared with further milling time. When the milling time is longer than 40 h, the perovskite structure disappeared and the amorphous phase was formed completely. Scanning electron microscopy picture of 24 h milled sample showed that the particle size generally varies in a broad range from nanometer scale to a few μm. The magnetic measurements showed that ball milling samples have an inhomogeneous magnetic state and exhibit spin-glass like behavior. The significantly small magnetic entropy change and a remarkably broad temperature interval in entropy change were attributed to high degree of structural and magnetic disorder and broadening of magnetic transition.
Źródło:
Acta Physica Polonica A; 2014, 125, 2; 214-216
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Interrelation between the Optical Conductivity and Crystal Field Splitting in Monolayer Manganites
Autorzy:
Rościszewski, K.
Oleś, A.
Powiązania:
https://bibliotekanauki.pl/articles/1810316.pdf
Data publikacji:
2009-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Lx
75.10.Lp
63.20.Pw
Opis:
We introduce an effective model for correlated $e_g$ electrons which reproduces qualitatively the evolution of magnetic order in monolayer manganites when correlated wave functions are used. Here we address recent optical conductivity measurements suggesting that the splitting between the occupied and empty $e_g$ states is very large in $LaSrMnO_4$, contrary to what is expected for the effective model. We argue that no contradiction was found but several simple-minded one-atom-based expectations concerning crystal-field splitting and optical conductivity are in error.
Źródło:
Acta Physica Polonica A; 2009, 115, 1; 107-109
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Atomic Order and the Interaction of Electronic and Magnetic Subsystems in Epitaxial LaSr(Ca)MnO Films
Autorzy:
Okunev, V. D.
Samoilenko, Z. A.
D'yachenko, T.
Abal'oshev, A.
Baran, M.
Gierłowski, P.
Lewandowski, S. J.
Szewczyk, A.
Szymczak, R.
Powiązania:
https://bibliotekanauki.pl/articles/2037110.pdf
Data publikacji:
2004
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.Kz
75.47.Lx
61.50.Ks
Opis:
We have investigated the structure, and electric, optical, and magnetic properties of LaSr(Ca)MnO films containing atomic clusters of various types coherently built into the basic crystallographic matrix. Below the transition to the metallic state, the electrical conductivity of the films is determined by tunneling of charge carriers between metallic clusters. We have found that for each sample there exists a threshold value of magnetic ordering, above which the magnetic subsystem starts to affect actively the film conductivity. The observed increase of conductivity with decreasing temperature is caused by the fact that in the process of magnetic ordering of the samples the cluster size and concentration of metallic phase increase. Experimental results are in agreement with theoretical calculations.
Źródło:
Acta Physica Polonica A; 2004, 105, 1-2; 121-126
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ageing phenomena in La-Sr manganites with divalent substituents for manganese
Autorzy:
Merkulov, D.
Badelin, A.
Estemirova, S.
Karpasyuk, V.
Powiązania:
https://bibliotekanauki.pl/articles/1048158.pdf
Data publikacji:
2018-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.30.-m
75.47.-m
75.47.Lx
81.70.-q
Opis:
Variations of electromagnetic and structural characteristics of La_{1-c+x}Sr_{c-x}Mn_{1-x}Me_{x}O_{3+γ} manganites (Me = Zn, Ni) during storage time up to 36000 hours at room temperature and after frequentative thermal cycling in the 300-573 K range were investigated. Changes of magnetization of all samples were within the error of measurement. In most cases Curie point (T_{C}) showed irregular variations within the range of 20%, while zinc-substituted manganites with relatively high values of "c" exhibited some trend of T_{C} rise. The resistance of all samples increased during storage period. The cell volume of single-phase manganites decreased over time, that may indicates an increase in oxygen content. However, the sample with the highest Ni content (x=0.125) at c=0.19 suffered phase transition "rhombohedral-orthorhombic structures", which cannot be explained by the oxygen absorption. Probably, this effect was due to the rearrangement of the ions and vacancies between crystal sublattices of manganite.
Źródło:
Acta Physica Polonica A; 2018, 133, 3; 529-531
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of Magnetoresistance and Its Anisotropy of Thin Polycrystalline $La_{0.83}Sr_{0.17}MnO_3$ Films in High Pulsed Magnetic Fields
Autorzy:
Žurauskienė, N.
Keršulis, S.
Medišauskas, L.
Tolvaišienė, S.
Powiązania:
https://bibliotekanauki.pl/articles/1505550.pdf
Data publikacji:
2011-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
75.30.Gw
85.70.Kh
Opis:
The results on the study of grain boundary effects and influence of film deposition conditions on the magnetoresistance and its anisotropy in polycrystalline $La_{0.83}Sr_{0.17}MnO_3$ films are presented. The magnetoresistance was measured in high pulsed magnetic fields up to 25 T (pulse duration ≈ 0.6 ms) in the temperature range of 120-300 K. A modified Mott hopping model was applied to describe the main behavior of high-field magnetoresistance for both ferromagnetic and paramagnetic phases of the polycrystalline films by taking into account the demagnetization field of the films measured in low magnetic fields perpendicular to film plane. It was also found that to obtain the higher magnetoresistance saturation field at room temperature it is necessary to use the films with smaller crystallites (D ≈ 100 nm). Such films could be used for design of megagauss pulsed magnetic field sensors.
Źródło:
Acta Physica Polonica A; 2011, 119, 2; 186-188
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Local Structure of Mn in $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ Studied by X-ray Absorption Fine Structure
Autorzy:
Pietnoczka, A.
Pękała, M.
Bacewicz, R.
Drozd, V.
Fagnard, J.
Vanderbemden, P.
Antonowicz, J.
Zalewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/1538864.pdf
Data publikacji:
2010-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cj
75.47.Lx
87.64.kd
Opis:
Results of X-ray absorption fine structure measurements in manganites $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ with 0.15 < x < 0.50 are presented. When $LaMnO_{3}$ is doped with a divalent element such as $Ca^{2+}$, substituting for $La^{3+}$, holes are induced in the filled Mn d orbitals. This leads to a strong ferromagnetic coupling between Mn sites. Ca ions in $La_{1-x}Ca_{x}MnO_{3}$ introduce a distortion of the crystal lattice and mixed valence Mn ions ($Mn^{3+}$ and $Mn^{4+}$). On the other hand, in manganites $(La_{1-x}Ho_{x})_{2//3}Ca_{1//3}MnO_{3}$ the substitution of La for Ho causes a lattice distortion and induces a disorder, which reduces a magnetic interaction. The ferromagnetic transition temperature and conductivity decrease very quickly with increasing x. The magnetic and transport properties of compounds depend on the local atomic structure around Mn ions. The information on the bond lengths and Debye-Waller factor are obtained from the extended X-ray absorption fine structure (EXAFS) data analysis. The charge state of Mn is determined from the position of the absorption edge in X-ray absorption near edge structure (XANES) data. XAFS results are in good agreement with magnetic characteristics of the studied materials.
Źródło:
Acta Physica Polonica A; 2010, 117, 2; 281-285
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Sr Content on CMR Effect in Polycrystalline $La_{1-x}Sr_{x}MnO_{3}$ Thin Films
Autorzy:
Žurauskienė, N.
Balevičius, S.
Stankevič, V.
Paršeliūnas, J.
Keršulis, S.
Abrutis, A.
Plaušinaitienė, V.
Powiązania:
https://bibliotekanauki.pl/articles/1807950.pdf
Data publikacji:
2009-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
75.47.Gk
75.47.Lx
75.30.Hx
85.70.Kh
Opis:
The magnetoresistance of thin polycrystalline $La_{1-x}Sr_{x}MnO_{3}$ films deposited on lucalox substrate using metal organic chemical vapor deposition technique was investigated in pulsed magnetic fields up to 18 T in the temperature range 100-320 K. The influence of film preparation conditions, ambient temperature variation and Sr content is analyzed in order to determine the optimal conditions for the design of CMR-B-scalar magnetic field sensor based on thin manganite film, operating at room temperature.
Źródło:
Acta Physica Polonica A; 2009, 115, 6; 1136-1138
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical Properties of Magnetite Nanoparticles Covered by 11-Mercaptoundecanoic Acid
Autorzy:
Timko, M.
Kopčanský, P.
Antalik, M.
Simsikova, M.
Valusova, E.
Molcan, M.
Kováč, J.
Powiązania:
https://bibliotekanauki.pl/articles/1429127.pdf
Data publikacji:
2012-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
47.65.Cb
85.70.-w
75.30.Cr
75.47.Lx
Opis:
We have investigated the magnetic behavior of magnetite nanoparticles covered by the 11-mercaptoundecanoic acid around magnetite core prepared by a standard co-precipitation method. The particles show superparamagnetic behavior at room temperature, with transition to a blocked state at blocking temperature 91 K estimated from zero field cooled and field cooled at 500 Oe experiment. The hysteresis loop measured at 293 K showed magnetization 32.8 emu/g at 50 kOe without any coercivity. The mean particle size (7.1 nm) was determined by fitting a magnetization curve obtained at 295 K assuming a log-normal size distribution.
Źródło:
Acta Physica Polonica A; 2012, 121, 5-6; 1321-1323
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth and Investigation of Heterostructures Based on Multiferroic $BiFeO_3$
Autorzy:
Vengalis, B.
Devenson, J.
Oginskis, A.
Butkutė, R.
Maneikis, A.
Steikūnienė, A.
Dapkus, L.
Banys, J.
Kinka, M.
Powiązania:
https://bibliotekanauki.pl/articles/1813484.pdf
Data publikacji:
2008-03
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
71.30.+h
73.43.Qt
75.47.Lx
Opis:
We report heteroepitaxial growth of multiferroic $BiFeO_3$ thin films by RF magnetron sputtering on lattice-matched $SrTiO_3$ substrates, as well as preparation and electrical properties of the heterostructures formed by growing $BiFeO_3$ thin films on highly conductive $LaNiO_3$ films and n-Si substrates. Nonlinear and rectifying current-voltage (I-U) characteristics were revealed for the heterojunctions in a wide temperature range (T=78-300 K).
Źródło:
Acta Physica Polonica A; 2008, 113, 3; 1095-1098
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
I-V Characteristics of Resistive Oxides: DC versus Pulsed Measurements
Autorzy:
Fisher, B.
Genossar, J.
Chashka, K. B.
Patlagan, L.
Reisner, G. M.
Powiązania:
https://bibliotekanauki.pl/articles/2047215.pdf
Data publikacji:
2007-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
72.20.Ht
75.47.Lx
77.80.Fm
Opis:
We investigated pulsed and DC I-V characteristics of a variety of resistive oxides. Examples of pulsed, compared with DC characteristics, are shown for samples of La$\text{}_{1.2}$Sr$\text{}_{1.8}$Mn$\text{}_{2}$O$\text{}_{7}$ (a double layer manganite), Pr$\text{}_{2}\text{}_{/}\text{}_{3}$ Ca$\text{}_{1}\text{}_{/}\text{}_{3}$ MnO$\text{}_{3}$ and Bi$\text{}_{1}\text{}_{/}\text{}_{2}$ Sr$\text{}_{1}\text{}_{/}\text{}_{2}$ MnO$\text{}_{3}$ (charge-ordered manganites), Sr$\text{}_{2}$FeMoO$\text{}_{6}$, Sr$\text{}_{2}$CrWO$\text{}_{6}$ and Ba$\text{}_{2}$MnReO$\text{}_{6}$ (double perovskites). For pulsed measurements, single pulses in the ms range were applied. For short-rise-time square pulses, the Joule heating is negligible, as long as the response remains independent of time. The DC I-V characteristics were measured up to current runaway in the negative resistance regime;Δ T never exceeded a fraction of a degree. In most cases the DC characteristics mask a perfectly ohmic or moderately non-ohmic conductivity obtained by pulsed measurements. This demonstrates that the widely used DC I-V measurements in the high current regime are frequently misleading.
Źródło:
Acta Physica Polonica A; 2007, 111, 1; 57-61
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-50 z 94

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies