Autor: Chromik, M. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Approximation of Electrical and Magneto Transport Properties of LSMO Thin Films
Autorzy:: Štrbík, V.
Reiffers, M.
Chromik, Š.
Španková, M.
Powiązania:: https://bibliotekanauki.pl/articles/1368199.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 73.43.Qt
75.47.-m
75.70.-i
Opis:: We have used a three term polynomial expression to approximate electrical and magneto transport properties of epitaxial $La_{0.67}Sr_{0.33}MnO_{3}$ (LSMO) thin films in wide temperature range (2-350 K) and in magnetic field up to 9 T. The first term is determined by a low temperature (T<20 K) residual resistivity $ρ_{0}$ and this term is magnetic field independent. The second term describes the electron-electron scattering in LSMO, it shows ~ $T^{2}$ dependence of resistivity up to temperature about 160 K and depends only weakly on magnetic field. The third term, proportional to ~ $T^{4.5}$ dependence, describes a significant increase of resistivity in temperature range 160-350 K and due to its sensitivity to applied magnetic field it is possible to approximate temperature dependence of magnetorestivity below 350 K.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 210-211
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 2.

Tytuł:: LSMO Films with Increased Temperature of MI Transition
Autorzy:: Španková, M.
Chromik, Š.
Dobročka, E.
Štrbík, V.
Sojková, M.
Powiązania:: https://bibliotekanauki.pl/articles/1368201.pdf
Data publikacji:: 2014-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 61.05.cp
75.47.Lx
81.15.Cd
81.15.Fg
Opis:: Epitaxial $La_{0.67}Sr_{0.33}MnO_{3}$ thin films with a significant increased temperature of metal-insulator transition (~450 K) are prepared on single crystal MgO (001) substrates using different deposition techniques - a dc magnetron sputtering or a pulsed laser deposition. The crystalline perfection of the films is characterized by X-ray diffraction technique (rocking curve measurements and reciprocal space maps). As a consequence of different methods of the film preparation we show various types of the LSMO crystal structure. Our results indicate that all the LSMO layers grown on the MgO substrate with a lattice misfit of about 8% are relaxed.
Źródło:: Acta Physica Polonica A; 2014, 126, 1; 212-213
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

Skocz do pozycji: 3.

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

Skocz do pozycji: 4.

Tytuł:: Characterization of epitaxial LSMO films grown on STO substrates
Autorzy:: Španková, M.
Štrbík, V.
Chromik, Š.
Zheng, D.
Li, J.
Machajdík, D.
Kobzev, A.
Plecenik, T.
Sojková, M.
Powiązania:: https://bibliotekanauki.pl/articles/1054697.pdf
Data publikacji:: 2017-04
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 68.37.Ps
75.47.Lx
75.70.Ak
81.15.Fg
Opis:: Epitaxial manganite La_{0.67}Sr_{0.33}MnO₃ (LSMO) layers, with a thickness of 20-50 nm, are prepared on single crystal (001) SrTiO₃ (STO) substrates by pulsed laser deposition technique. Structural characterization (composition analysis, surface morphology), investigated by the Rutherford backscattering spectroscopy and atomic force microscopy, reveals the growth of stoichiometric LSMO films with a smooth surface (root-mean-square value of 0.21-1.6 nm). The prepared LSMO films possess high Curie temperature ( ≈ 412 K), low room temperature resistivity (1-2 mΩ cm) and maximum of temperature coefficient of resistivity TCR = 2.7% K¯¹ at 321 K.
Źródło:: Acta Physica Polonica A; 2017, 131, 4; 848-850
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

Artykuł

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