Influence of magnetic ordering on structural instabilities in insulating perovskites

被引：16

作者：

Garcia-Fernandez, Pablo ^{[1
]}

Antonio Aramburu, Jose ^{[1
]}

Moreno, Miguel ^{[1
]}

机构：

[1] Univ Cantabria, Dept Ciencias Tierra & Fis Mat Condensada, E-39005 Santander, Spain

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 17期

关键词：

MULTIFERROICS;

D O I：

10.1103/PhysRevB.83.174406

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We propose a general model, based on Anderson superexchange and the pseudo Jahn-Teller effect, to explain why ferroelectric and octahedral tilting distortions are favored by ferromagnetic ordering when compared to antiferromagnetic tilting distortions in ABX(3) (A = alkali, alkaline-earth ion, f-filling rare earth; B = magnetic transition-metal ion; X = O2-, F-) perovskite crystals. Ab initio calculations are used to check the model under a wide range of pressures for oxides and fluorides, with the latter displaying an enhancement of the ferroelectric distortion when pressure is increased.

引用

页数：5

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