摘要
构建了不同面内应变条件下的Fe/BaTiO3多铁隧道结模型,通过第一性原理计算,对Fe/BaTiO3多铁隧道结中的磁电耦合效应进行了分析。通过对比处于不同面内应变条件下的Fe/BaTiO3电学和磁学性能,得到其铁电极化强度及磁电耦合因数在面内压应变下增大,而在面内张应变下减小的结果。这表明,Fe/BaTiO3多铁隧道结中的磁电耦合性能可以被应变效应所调控,增大面内压应变,能有效提高多铁隧道结的磁电耦合特性。
A model of Fe/BaTiO 3 multiferroic tunnel junctions under different in-plane strain conditions is developed. The magnetoelectric coupling effect in Fe/BaTiO 3 multiferroic tunnel junctions is studied by first-principles calculation. By comparing the electrical and magnetic properties under different in-plane strain conditions, it is found that the ferroelectric polarizations and magnetoelectric coupling coefficient increase under in-plane compressive strain and decrease under in-plane tension strain, which indicates that the ferroelectric polarization and magnetoelectric coupling in multiferroic tunnel junctions can be controlled by strain effect, and the magnetoelectric coupling characteristics of multiferronic tunnel junctions can be effectively improved by increasing in-plane compressive strain.
作者
李刚
唐明华
LI Gang;TANG Ming-hua(School of Materials Science and Engineering, Xiangtan University, Xiangtan 411105, China)
出处
《现代应用物理》
2019年第2期55-61,共7页
Modern Applied Physics
基金
强脉冲辐射环境模拟与效应国家重点实验室基础研究课题资助项目(SKLIPR1606)
关键词
多铁隧道结
磁电耦合效应
应变
第一性原理
multiferroic tunnel junctions
magnetoelectric coupling effect
strain
first-principles
