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Heat capacity of BiFeO3-based multiferroics

  • Order, Disorder, and Phase Transition in Condensed System
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Abstract

The heat capacity of Bi1 − x Re x FeO3 (Re = La, Eu, Ho; x = 0, x = 0.05) multiferroics has been studied in the temperature range of 120–800 K. The substitution of a small amount of rare-earth elements for bismuth leads to a significant increase in the heat capacity in the broad temperature range studied. It is established that the temperature dependence of the excess heat capacity is related to the Schottky effect for three-level states certain that appear as a result of structure distortions in the rare-earth-doped compositions.

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Authors and Affiliations

  1. Institute of Physics, Dagestan Scientific Center, Russian Academy of Sciences, Makhachkala, Dagestan, 367025, Russia

    S. N. Kallaev, Z. M. Omarov & G. G. Gadzhiev

  2. Dagestan State University, Makhachkala, Dagestan, 367000, Russia

    S. N. Kallaev

  3. Dagestan State Technical University, Makhachkala, Dagestan, 367015, Russia

    R. G. Mitarov

  4. Research Institute of Physics, Southern Federal University, Rostov-on-Don, 344090, Russia

    L. A. Reznichenko

Authors
  1. S. N. Kallaev
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  2. R. G. Mitarov
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  3. Z. M. Omarov
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  4. G. G. Gadzhiev
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  5. L. A. Reznichenko
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Correspondence to S. N. Kallaev.

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Original Russian Text © S.N. Kallaev, R.G. Mitarov, Z.M. Omarov, G.G. Gadzhiev, L.A. Reznichenko, 2014, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2014, Vol. 145, No. 2, pp. 320–324.

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Kallaev, S.N., Mitarov, R.G., Omarov, Z.M. et al. Heat capacity of BiFeO3-based multiferroics. J. Exp. Theor. Phys. 118, 279–283 (2014). https://doi.org/10.1134/S1063776114020095

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  • DOI: https://doi.org/10.1134/S1063776114020095

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