Abstract
The reflection and magnetic reflection spectra, magnetic resistance, electrical properties, and equatorial Kerr effect in La0.7Ca0.3MnO3 crystals have been complexly investigated. The measurements have been performed in wide temperature and spectral ranges in magnetic fields up to 3.5 kOe. It has been found that magnetic reflection is a high-frequency response in the infrared spectral range to the colossal magnetore-sistance near the Curie temperature. Correlation between the field and temperature dependences of the magnetic reflection and colossal magnetoresistance has been revealed. The previously developed theory of the magnetorefractive effect for metallic systems makes it possible to explain the experimental data at the qualitative level. Both demerits of the theory of the magnetorefractive effect in application to the magnets and possible additional mechanisms responsible for the magnetic reflection are discussed.
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Original Russian Text © Yu.P. Sukhorukov, A.V. Telegin, A.B. Granovskii, E.A. Gan’shina, S.V. Naumov, N.V. Kostromitina, L.V. Elokhina, J. Gonzalez, 2010, published in Zhurnal Éksperimental’noĭ i Teoreticheskoĭ Fiziki, 2010, Vol. 138, No. 3, pp. 402–410.
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Sukhorukov, Y.P., Telegin, A.V., Granovskii, A.B. et al. Magnetorefractive effect in La0.7Ca0.3MnO3 in the infrared spectral range. J. Exp. Theor. Phys. 111, 355–362 (2010). https://doi.org/10.1134/S1063776110090037
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DOI: https://doi.org/10.1134/S1063776110090037