Differences of the temperatures of ferroelectric and magnetic phase transitions of perovskites

Abstract

Binary $AB{\mathrm{O}}_3$ and ternary AB′_0.5B″_0.5O₃ oxides with a complex perovskite structure, possessing the consecutive ferroelectric or antiferroelectric phase transitions at T_C and ferromagnetic, antiferromagnetic, or ferrimagnetic phase transitions at T_N, are considered together with classical ferroelectrics and antiferroelectrics. The common correlations between these temperatures, their differences T_С-T_N and interatomic bond A-O (δ_AO) or B-O (δ_BO) strains are revealed. Some common correlations between their temperatures T_С, T_N, T_С-T_N differences, and δ_AO or δ_BO are revealed. It is established that these differences for multiferroics are in common dependences with classical ferroelectrics and antiferroelectrics.

Keywords:

• Phase transition temperature
• ferroelectric
• antiferroelectric
• magnetic
• multiferroic
• perovskite structure oxides
• interatomic bond strain

Additional information

Funding

The study was financially supported by the Ministry of Science and Higher Education of the Russian Federation (state task in the field of scientific activity, scientific project No. 0852-2020-0032 (BAS0110/20-3-08IF)).