Magnetic-Domain-Wall-Induced Electrical Polarization in Rare-Earth Iron Garnet Systems: A First-Principles Study

被引：11

作者：

Bayaraa, Temuujin ^{[1
]}

Xu, Changsong ^{[1
,2
]}

Yang, Yali ^{[3
,4
]}

Xiang, Hongjun ^{[3
,4
,5
,6
]}

Bellaiche, L. ^{[1
,2
]}

机构：

[1] Univ Arkansas, Dept Phys, Fayetteville, AR 72701 USA

[2] Univ Arkansas, Inst Nanosci & Engn, Fayetteville, AR 72701 USA

[3] Fudan Univ, Key Lab Computat Phys Sci, State Key Lab Surface Phys, Minist Educ, Shanghai 200433, Peoples R China

[4] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China

[5] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China

[6] Shanghai Qi Zhi Inst, Shanghai 200232, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2020年 / 125卷 / 06期

关键词：

STRUCTURAL-PROPERTIES; FILMS; MULTIFERROICS; COMPENSATION; ORIGIN;

D O I：

10.1103/PhysRevLett.125.067602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

First-principles methods are employed to understand the existence of magnetic-domain-wall-induced electric polarization observed in rare-earth iron garnets. In contrast with previous beliefs, it is found that the occurrence of such polarization neither requires the local magnetic moments of the rare-earth ions nor noncollinear magnetism. It can rather be understood as originating from a magnetoelectric effect arising from ferromagnetic interactions between octahedral and tetrahedral Fe ions at the domain walls, and the mechanism behind is found to be a symmetric exchange-striction mechanism.

引用

页数：6

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