6533b7d8fe1ef96bd126abcb

RESEARCH PRODUCT

Thermal properties of multiferroic Bi1−xEuxFeO3 (х = 0–0.40) ceramics

Z. M. OmarovK. BormanisA.g. BakmaevR. G. MitarovS.n. KallaevL. A. Reznichenko

subject

Thermal effective massPhase transitionMaterials scienceCondensed matter physicsMechanical EngineeringTransition temperatureMetals and Alloys02 engineering and technologyThermal transfer021001 nanoscience & nanotechnologyThermal conductionThermal diffusivity01 natural sciencesHeat capacityThermal conductivityMechanics of Materials0103 physical sciencesMaterials Chemistry010306 general physics0210 nano-technology

description

Abstract A study of thermal diffusion, heat capacity and thermal conductivity of multiferroic Bi 1−x Eu x FeO 3 (x = 0–0.4) within the range of 130–1200 K is reported. Modifying by admixture of Eu is found to change substantially the thermal anomalies of diffusion and thermal conductivity of the antiferromagnetic phase transition, to increase heat capacity over a wide range of temperatures and to shift the antiferromagnetic transition temperature. The excess heat capacity is shown being related to Schottky effect of three-level states. The mechanisms dominating thermal transfer of phonons at the phase transition and dependence of the mean free path of phonons on the temperature are determined. The results are discussed with account of structural data.

yearjournalcountryeditionlanguage
2017-02-01Journal of Alloys and Compounds
https://doi.org/10.1016/j.jallcom.2016.11.347