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Electrical and resonance properties of magnetically inhomogeneous La0.775Sr0.225MnO3−δ films

  • Magnetism and Ferroelectricity
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Abstract

Electrical properties and magnetic-resonance spectra are studied in La0.775Sr0.225MnO3−δ thin films obtained on SrTiO3 single-crystal substrates through magnetron sputtering. Below 250 K, the essential influence of the intensity of an electric current flowing through a film on the electrical resistance of the sample is observed. It is experimentally shown that as the current density is increased in the low-temperature range, the semiconducting conduction transforms into metallic conduction. Arguments are advanced in favor of the hypothesis that the strong sensitivity of the film properties to external factors is caused by the coexistence of ferromagnetic metallic and charge-or orbital-ordered phases in a sample.

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Authors and Affiliations

  1. Institute of Magnetism, National Academy of Sciences of Ukraine, Kiev, 03142, Ukraine

    A. I. Tovstolytkin, A. N. Pogorily, I. V. Lezhnenko, A. I. Matviyenko, D. I. Podyalovski & V. P. Kravchik

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  1. A. I. Tovstolytkin
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  2. A. N. Pogorily
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  3. I. V. Lezhnenko
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  4. A. I. Matviyenko
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  5. D. I. Podyalovski
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  6. V. P. Kravchik
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__________

Translated from Fizika Tverdogo Tela, Vol. 45, No. 10, 2003, pp. 1857–1861.

Original Russian Text Copyright © 2003 by Tovstolytkin, Pogorily, Lezhnenko, Matviyenko, Podyalovski, Kravchik.

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Tovstolytkin, A.I., Pogorily, A.N., Lezhnenko, I.V. et al. Electrical and resonance properties of magnetically inhomogeneous La0.775Sr0.225MnO3−δ films. Phys. Solid State 45, 1952–1956 (2003). https://doi.org/10.1134/1.1620101

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  • DOI: https://doi.org/10.1134/1.1620101

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