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Phase transitions
Thermal physical and dielectric properties of Bi$_{1-x}$Er$_{x}$FeO$_{3}$
S. N. Kallaeva, Z. M. Omarova, A. R. Bilalova, A. Ya. Kurbaitaeva, L. A. Reznichenkob, S. W. Khasbulatovb, R. M. Ferzilaeva a Daghestan Institute of Physics after Amirkhanov, Makhachkala, Dagestan, Russia
b Research Institute of Physics, Southern Federal University, Rostov-on-Don
Abstract:
The heat capacity and the permittivity of multiferroics Bi$_{1-x}$Er$_{x}$FeO$_{3}$ ($x$ = 0, 0.10, and 0.15) have been studied in the temperature range 130–800 K. It is found that an insignificant substitution of erbium for bismuth significantly increases the heat capacity in a wide temperature range $T>$ 300 K. The temperature dependence of the excess heat capacity is shown to be due to manifestation of the three-level states. An additional anomaly characteristic of a phase transition has been revealed in the temperature dependences of the heat capacity and the permittivity for the compositions with $x$ = 0.15 at $T$ = 587 K. The results of studies are discussed in combination of the data of structural studies.
Received: 21.02.2018
Citation:
S. N. Kallaev, Z. M. Omarov, A. R. Bilalov, A. Ya. Kurbaitaev, L. A. Reznichenko, S. W. Khasbulatov, R. M. Ferzilaev, “Thermal physical and dielectric properties of Bi$_{1-x}$Er$_{x}$FeO$_{3}$”, Fizika Tverdogo Tela, 60:9 (2018), 1811–1814; Phys. Solid State, 60:9 (2018), 1861–1864
Linking options:
https://www.mathnet.ru/eng/ftt9089 https://www.mathnet.ru/eng/ftt/v60/i9/p1811
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Abstract page: | 48 | Full-text PDF : | 12 |
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