Open AccessТеплоемкость и диэлектрические свойства мультиферроика Bi-=SUB=-0.8-=/SUB=-Ho-=SUB=-0.2-=/SUB=-FeO-=SUB=-3-=/SUB=-
Author(s) -
S. N. Kallaev,
С. А. Садыков,
Н. М.-Р. Алиханов,
З. М. Омаров,
R. G. Mitarov,
Л. А. Резниченко
Publication year - 2020
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2020.06.49349.015
Subject(s) - holmium , multiferroics , permittivity , doping , materials science , condensed matter physics , anomaly (physics) , phase transition , heat capacity , atmospheric temperature range , specific heat , transition temperature , thermodynamics , physics , superconductivity , ferroelectricity , dielectric , optics , laser , optoelectronics
The heat capacity and permittivity of Bi0.8Ho0.2FeO3 multiferroics were studied in a wide temperature range of 300--750 K. It was found that doping with holmium with rare-earth element leads to significant changes in the temperature dependences of the specific heat Cp and permittivity ε 'at high temperatures. It is shown that an additional contribution to the specific heat can be interpreted as a Schottky anomaly for three-level states arising due to distortion of the lattice parameters upon doping. An additional anomaly characteristic of the phase transition was found in the temperature dependences of Cp and ε '. Research results are discussed in conjunction with structural studies.