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Tytuł:
Equation of State of Zircon-Type $TbVO_{4}$
Autorzy:
Minikayev, R.
Paszkowicz, W.
Werner-Malento, E.
Lathe, C.
Dąbkowska, H.
Powiązania:
https://bibliotekanauki.pl/articles/1538929.pdf
Data publikacji:
2010-02
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.05.cp
62.50.-p
61.50.Ks
64.30.Jk
Opis:
High-pressure energy-dispersive X-ray diffraction study were performed on zircon-type phase of terbium orthovanadate, $TbVO_{4}$, in the pressure range up to 7 GPa. For analysis of the collected diffraction spectra, Le Bail refinements were performed. The values of bulk modulus and its pressure derivative ($B_0$ = 121 GPa, B' = 4.1) were obtained from fitting of the second-order Birch-Murnaghan equation of state. The equation of state derived for $TbVO_{4}$, is compared with earlier data based on the Raman spectroscopic studies and with data of several other rare-earth orthovanadates.
Źródło:
Acta Physica Polonica A; 2010, 117, 2; 319-322
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Microhardness and the Young Modulus of Thin, MBE-Grown, (Sn,Mn)Te Layers Containing up to 8% of Mn
Autorzy:
Adamiak, S.
Zięba, M.
Minikayev, R.
Reszka, A.
Taliashvili, B.
Szuszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1033220.pdf
Data publikacji:
2017-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.de
62.20.Qp
68.60.Bs
Opis:
The thin layers of (Sn,Mn)Te solid solution were grown by molecular beam epitaxy onto (111)-oriented BaF₂ substrates and characterized by scanning electron microscopy, atomic force microscopy, energy dispersive X-ray spectrometry, and X-ray diffraction methods. The epitaxial character of the growth was confirmed. All the layers exhibited a regular (fcc) structure of the rock-salt type and were (111)-oriented, their thickness was close to about 1 μm. The layers contained up to 8% of Mn. The microhardness and the Young modulus values were determined by the nanoindentation measurements. The Berkovich type of the intender was applied, the maximum applied load was equal to 1 mN. The results of measurements demonstrated a lack of the composition dependence of the Young modulus value. A slight increase of the microhardness value with an increasing Mn content in the (Sn,Mn)Te solid solution was observed.
Źródło:
Acta Physica Polonica A; 2017, 132, 2; 347-350
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Superconductivity and Magnetism in Nd$\text{}_{0.5}$Sr$\text{}_{0.5}$MnO$\text{}_{3}$/YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$ Superlattices
Autorzy:
Tsarou, A.
Paszkowicz, W.
Minikayev, R.
Dłużewski, P.
Sawicki, M.
Przysłupski, P.
Powiązania:
https://bibliotekanauki.pl/articles/2047250.pdf
Data publikacji:
2007-01
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.25.Ha
74.78.Fk
75.70.Cn
Opis:
We report the synthesis and characterization of Nd$\text{}_{0.5}$Sr$\text{}_{0.5}$MnO$\text{}_{3}$/YBa$\text{}_{2}$Cu$\text{}_{3}$O$\text{}_{7}$ superlattices. X-ray diffraction studies show that the superlattices are [001] oriented. We observe that the magnetic ground state of Nd$\text{}_{0.5}$Sr$\text{}_{0.5}$MnO$\text{}_{3}$ system in a multilayered structure is strongly dependent on the substrate.
Źródło:
Acta Physica Polonica A; 2007, 111, 1; 179-183
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
From Cuprate to Nickelate: Evolution of the Normal State Properties with Ni from $La_{1.85}Sr_{0.15}CuO_4$ to $La_{1.85}Sr_{0.15}NiO_4$
Autorzy:
Bezusyy, V.
Malinowski, A.
Minikayev, R.
Paszkowicz, W.
Dziawa, P.
Gorzelniak, R.
Powiązania:
https://bibliotekanauki.pl/articles/1537207.pdf
Data publikacji:
2010-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.25.Ha
74.72.-h
74.72.Kf
75.30.-m
Opis:
The influence of Ni doping on the normal-state pseudogap in $La_{1.85}Sr_{0.15}CuO_4$ is studied by dc magnetic susceptibility measurements, accompanied by X-ray powder diffraction analysis and resistivity measurements. The measurements are carried out on the polycrystalline $La_{1.85}Sr_{0.15}Cu_{1-y}Ni_yO_4$ samples in the whole doping range from y=0.01 up to y=1. The temperature of pseudogap opening is found to decrease above y=0.05 and to vanish when y exceeds 0.07. At small Ni content, up to y=0.07, the magnetic moment induced by Ni is constant and equal to 0.7 $μ_{B}$ per Ni, while for larger y it increases abruptly and reaches about 1.6 $μ_{B}$ per Ni ion for y = 0.5. The dependence of the normal-state resistivity on temperature evolves smoothly from the metallic-like for small y, to the variable range hopping, described by the Mott law with the exponent 1/4, for samples with y>0.15.
Źródło:
Acta Physica Polonica A; 2010, 118, 2; 402-405
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Magnetic Nature of a Ni Dopant in $La_{1.85}Sr_{0.15}CuO_4$: Spin-Glass Behavior
Autorzy:
Malinowski, A.
Bezusyy, V.
Minikayev, R.
Paszkowicz, W.
Dziawa, P.
Syryanyy, Y.
Sawicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/1536592.pdf
Data publikacji:
2010-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.62.Dh
75.40.Cx
75.40.Gb
75.50.Lk
Opis:
The magnetic properties of $La_{1.85}Sr_{0.15}CuO_4$ doped with Ni was investigated in the field up to 5 T and in the temperature range from 2 K to 400 K using both dc and ac techniques. For Ni content larger than 0.05 the system exhibits irreversibility of low-field susceptibility χ(T) below a certain temperature depending on y and a cusp at $T_{g}$ in χ(T) measured after zero-field cooling. The decay of remnant magnetization below $T_{g}$ with time is described by a stretched-exponential function. In accordance with scaling theory, all the χ(T) data for y = 0.50 sample taken in the vicinity of $T_{g}$ at different fields collapse onto two separate curves when plotted as $q|t|^{-β}$ vs. B$^2 |t|^{-β - γ}$, where q is the spin-glass order parameter, t = (T - $T_{g}$)/$T_{g}$, and β and γ are the critical exponents. All these features taken together reveal existence of spin-glass phase below $T_{g}$. Variation of $T_{g}$ with y is linear below y = 0.25 and $T_{g}$ extrapolates to 0 K for y → 0 what strongly suggests that spin-glass phase extends into superconducting region of the phase diagram.
Źródło:
Acta Physica Polonica A; 2010, 118, 2; 244-248
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolution of Pb$\text{}_{1-x}$Cd$\text{}_{x}$Te Solid Solution Structure at High Temperatures
Autorzy:
Minikayev, R.
Dynowska, E.
Kamińska, E.
Szczerbakow, A.
Trots, D.
Story, T.
Szuszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/2048121.pdf
Data publikacji:
2011-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
78.30.Fs
81.10.Fq
Opis:
The recent successful growth of single, bulk Pb$\text{}_{1-x}$Cd$\text{}_{x}$Te crystals by self-selecting vapor transport method at the Institute of Physics of the Polish Academy of Sciences in Warsaw opened new opportunities to study the physical properties of this interesting material in detail. In this work we report the preliminary results of X-ray powder diffraction studies performed on a set of Pb$\text{}_{1-x}$Cd$\text{}_{x}$Te solid solutions (where x ≤ 0.056) at high temperatures (295 K ≤ T ≤ 1100 K) and analyzed with the Rietveld refinement. Our results demonstrate the necessity of some correction of the relevant phase diagram and of the solubility limit, known from the literature.
Źródło:
Acta Physica Polonica A; 2011, 119, 5; 699-701
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrathin Niobium in the Si/Nb/Si Trilayers
Autorzy:
Zaytseva, I.
Abal'oshev, O.
Dłużewski, P.
Minikayev, R.
Cieplak, Marta
Zhu, L.
Chien, C.
Powiązania:
https://bibliotekanauki.pl/articles/1374193.pdf
Data publikacji:
2014-10
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
74.78.-w
74.70.Ad
74.25.-q
Opis:
We study magnetotransport properties of the Si/Nb/Si trilayers, in which the thickness of niobium, d, changes from 1.1 nm to 50 nm, while the thickness of Si is fixed at 10 nm. The niobium films are amorphous for d < 4 nm, while in thicker films the alligned polycrystalline grains are formed. We observe that the Hall coefficient changes sign into negative in the films with d < 1.6 nm. We also find that in the ultrathin films the magnetic field induces a transition from the superconducting into a metallic phase with the resistance smaller than the normal-state resistance.
Źródło:
Acta Physica Polonica A; 2014, 126, 4a; A-140-A-144
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Young modulus and microhardness anisotropy in (Pb,Cd)Te solid solution crystallizing in the rock salt structure and containing 5% of Cd
Autorzy:
Łusakowska, E.
Adamiak, S.
Adamski, P.
Kuna, R.
Minikayev, R.
Skupiński, P.
Szczerbakow, A.
Szuszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1055144.pdf
Data publikacji:
2017-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
62.20.-x
Opis:
A single crystal of (Pb,Cd)Te solid solution with Cd content equal to 5% was grown by self-selecting vapour growth technique and characterized by powder X-ray diffraction using the X'Pert PANalytical diffractometer and Cu K_{α₁} radiation. The X-ray diffraction pattern refinement demonstrated the fcc structure of the rock-salt type of investigated sample, no precipitates or other crystal phases were detected. The sample chemical composition was determined on the basis of measured lattice parameter value. Next, the Young modulus and microhardness were determined by the nanoindentation for carefully prepared, (001), (011) and (111)-oriented single crystal plates. The slight anisotropy of two parameters mentioned above has been found and compared with available literature data.
Źródło:
Acta Physica Polonica A; 2017, 132, 2; 343-346
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structure and Electrical Resistivity Dependence of Molybdenum Thin Films Deposited by DC Modulated Pulsed Magnetron Sputtering
Autorzy:
Wicher, B.
Chodun, R.
Nowakowska-Langier, K.
Okrasa, S.
Król, K.
Minikayev, R.
Strzelecki, G.
Zdunek, K.
Powiązania:
https://bibliotekanauki.pl/articles/350987.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
magnetron sputtering
modulated pulse magnetron sputtering
plasma&films characterization
Opis:
This work reports the results of a study of Mo thin films synthesis by DC Pulsed Magnetron Sputtering method (PMS), operating at pulse main frequency of 100 kHz and modulated by the additional modulation frequency, driving in the range of 5-1000 Hz (modulated Pulse Magnetron Sputtering – mPMS). We have studied the influence of mPMS on plasma chemical reactions and mechanisms of layer growth using optical emission spectroscopy technique. Our experiment showed strong influence of mPMS method, on the morphology (scanning electron microscopy), phase composition (X-ray diffractometry) and electric properties (4-point probes method) of nanocrystalline and amorphous Mo films. From the utilitarian point of view, low value of resistivity – 43,2 μΩcm of synthesized Mo films predestines them as back contacts for thin solar cells CIGS. Our results revealed that additional modulation frequency should be considered as an important factor for optimization of films synthesis by means of PMS-based methods.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 3; 1339-1344
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Inelastic X-Ray Scattering Studies of Phonon Dispersion in PbTe and (Pb,Cd)Te Solid Solution
Autorzy:
Kuna, R.
Minikayev, R.
Trzyna, M.
Gas, K.
Bosak, A.
Szczerbakow, A.
Petit, S.
Łażewski, J.
Szuszkiewicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/1398584.pdf
Data publikacji:
2016-11
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
63.20.D-
68.43.-h
68.49.Sf
Opis:
PbTe and its solid solution (Pb,Cd)Te containing 2% of CdTe and PbTe grown by self-selecting vapour growth technique were investigated by inelastic X-ray scattering using synchrotron radiation. The ID28 beamline at ESRF with the incident photon energy of 17794 eV and the energy resolution of 3 meV was applied for that purpose. The measurements were performed at room temperature along [001]-type high symmetry direction in the Brillouin zone. In spite of a very low energy of phonon branches they can be determined by inelastic X-ray scattering with a high accuracy. The transversal acoustic phonon dispersion obtained by inelastic X-ray scattering corresponds well to those resulting from inelastic neutron scattering measurements and ab initio calculations. Apart from expected structures corresponding to the bulk phonons an additional scattering related to the crystal surface properties was observed in the inelastic X-ray scattering spectra. The analysis performed with the use of secondary ion mass spectroscopy technique demonstrated a presence of a thin oxide layer at sample surfaces.
Źródło:
Acta Physica Polonica A; 2016, 130, 5; 1251-1254
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 15

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