Correlations between interatomic bond strain and Curie temperature for complex oxides based on quasielastic model of perovskite structure

Abstract

Some correlations between interatomic bond A–O strain and ferroelectric or antiferroelectric phase transition Curie temperature TC have been revealed for complex perovskite structure oxides (PSO) with composition of and types using perovskite structure quasi-elastic model. It has been established that both binary and ternary PSO have similar tendency for TC change with increasing interatomic bond A–O strain: first, TC increases and then decreases. At a certain value, TC of binary PSO has a maximum for both ferroelectric and antiferroelectric binary perovskites. Nevertheless, for ternary ferroelectrics such maximum is not observed.