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Contribution of Co3+ ions to the high-temperature magnetic and electrical properties of GdCoO3

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Abstract

The temperature dependence of the static magnetization of polycrystalline rare-earth cobaltite GdCoO3 is measured in the temperature range 2–800 K. The magnetic behaviors of GdCoO3 and Gd3+ are found to be different at temperatures above room temperature, which is caused by the appearance of a contribution from Co3+ ions at high temperatures. The temperature dependence of the magnetic susceptibility of GdCoO3 is determined by the magnetization of rare-earth gadolinium ions and the additional paramagnetic contribution induced by the thermally excited magnetic terms of Co3+ ions. The LDA + GTB method is used to calculate the electronic structure of GdCoO3 in the temperature range 0–300 K with allowance for strong electron correlations. The energy spectrum of GdCoO3 is found to have intragap states that decrease the dielectric gap width with increasing temperature.

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Authors and Affiliations

  1. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50-38, Krasnoyarsk, 660036, Russia

    V. A. Dudnikov, S. G. Ovchinnikov, Yu. S. Orlov, N. V. Kazak, G. S. Patrin & G. Yu. Yurkin

  2. Reshetnev Siberian State Aerospace University, pr. im. Gazety “Krasnoyarskii Rabochii” 31, Krasnoyarsk, 660014, Russia

    V. A. Dudnikov

  3. Siberian Federal University, Krasnoyarsk, 660041, Russia

    S. G. Ovchinnikov & G. S. Patrin

  4. Universidade de Guadalajara, Guadalajara, 44430, Mexico

    C. R. Michel

Authors
  1. V. A. Dudnikov
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  2. S. G. Ovchinnikov
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  3. Yu. S. Orlov
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  4. N. V. Kazak
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  5. C. R. Michel
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  6. G. S. Patrin
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  7. G. Yu. Yurkin
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Correspondence to V. A. Dudnikov.

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Original Russian Text © V.A. Dudnikov, S.G. Ovchinnikov, Yu.S. Orlov, N.V. Kazak, C.R. Michel, G.S. Patrin, G.Yu. Yurkin, 2012, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2012, Vol. 141, No. 5, pp. 966–975.

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Dudnikov, V.A., Ovchinnikov, S.G., Orlov, Y.S. et al. Contribution of Co3+ ions to the high-temperature magnetic and electrical properties of GdCoO3 . J. Exp. Theor. Phys. 114, 841–849 (2012). https://doi.org/10.1134/S106377611203003X

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  • DOI: https://doi.org/10.1134/S106377611203003X

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