Effect of Substrate-Induced Stresses on the Electrical and Magnetic Properties of Ultrathin La$_{0.6}$Sr$_{0.2}$Mn$_{1.2}$O$_{3}$/LaAlO$

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Effect of Substrate-Induced Stresses on the Electrical and Magnetic Properties of Ultrathin La $_{0.6}$ Sr $_{0.2}$ Mn $_{1.2}$ O $_{3}$ /LaAlO $_{3}$ Films

T. I. Polek $^{1}$ , D. I. Podyalovskii $^{1}$ , O. I. Tovstolytkin $^{1}$ , A. M. Pogorilyy $^{1}$ , O. V. Pashchenko $^{2}$

$^{1}$ Institute of Magnetism under NAS and MES of Ukraine, 36b Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine
$^{2}$ Donetsk Institute for Physics and Engineering Named after O.O. Galkin, NAS of Ukraine, 72 R. Luxembourg Str., 83114 Donetsk, Ukraine

Received: 29.11.2013. Download: PDF

Magnetoresistive and resonance properties of ultrathin films (2—12 nm) of lanthanum-strontium La $_{0.6}$ Sr $_{0.2}$ Mn $_{1.2}$ O $_{3}$ manganites are studied. The films were deposited on LaAlO $_{3}$ single-crystalline substrate by magnetron sputtering. Characteristic features of the evolution of magnetic properties with the decrease of film thickness are specified. The electron-spin resonance studies show that the films are ferromagnetic down to a film thickness of 4 nm and retain a relatively high Curie temperature, $Т_{С}$ . Based on the analysis of magnetoresistive and resonance data, it is concluded that the films with the thickness of 4 nm and less display high degree of inhomogeneity.

Key words: doped manganites, metal—insulator transition, electron spin resonance, magnetoresistance.

URL: http://mfint.imp.kiev.ua/en/abstract/v36/i01/0063.html

DOI: https://doi.org/10.15407/mfint.36.01.0063

PACS: 71.30.+h, 73.50.Jt, 75.47.Gk, 75.47.Lx, 76.30.-v

Citation: T. I. Polek, D. I. Podyalovskii, O. I. Tovstolytkin, A. M. Pogorilyy, and O. V. Pashchenko, Effect of Substrate-Induced Stresses on the Electrical and Magnetic Properties of Ultrathin La $_{0.6}$ Sr $_{0.2}$ Mn $_{1.2}$ O $_{3}$ /LaAlO $_{3}$ Films, Metallofiz. Noveishie Tekhnol., 36, No. 1: 63—76 (2014) (in Ukrainian)

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