$\rm Bi_{0.9}\rm M_{0.1}\rm FeO_3\,(\rm M - \rm La{,}\,\rm Pr{,}\,\rm Nd{,}\,\rm Sm)$ multiferroics: thermophysical properties at high temperatures

Comprehensive studies of the thermophysical properties (thermal conductivity, thermal diffusivity, heat capacity, thermal expansion coefficient) of solid solutions of the $\rm Bi_{0.9}\rm M_{0.1}\rm FeO_3\,(\rm M - \rm La{,}\,\rm Pr{,}\,\rm Nd{,}\,\rm Sm)$ multiferroics have been carried out within the temperature range of $300$–$800$ K. Anomalies of the thermophysical properties caused by phase transitions are observed within the Néel temperature domain $(640$–$650$ K$)$. Formulas are proposed for the calculation of the studied thermophysical properties within the domains of the structural phase transitions, and a clear correlation is established for the dependences of the thermophysical properties within the domain of the structural phase transitions.