Bulk magnetoelectricity in the hexagonal manganites and ferrites

被引：192

作者：

Das, Hena ^{[1
]}

Wysocki, Aleksander L. ^{[1
]}

Geng, Yanan ^{[2
,3
]}

Wu, Weida ^{[2
,3
]}

Fennie, Craig J. ^{[1
]}

机构：

[1] Cornell Univ, Sch Appl & Engn Phys, Ithaca, NY 14853 USA

[2] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

[3] Rutgers State Univ, Rutgers Ctr Emergent Mat, Piscataway, NJ 08854 USA

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

关键词：

DOMAIN-WALLS; FERROELECTRICITY; MULTIFERROICS;

D O I：

10.1038/ncomms3998

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Improper ferroelectricity (trimerization) in the hexagonal manganites RMnO3 leads to a network of coupled structural and magnetic vortices that induce domain wall magnetoelectricity and magnetization (M), neither of which, however, occurs in the bulk. Here we combine first-principles calculations, group-theoretic techniques and microscopic spin models to show how the trimerization not only induces a polarization (P) but also a bulk M and bulk magnetoelectric (ME) effect. This results in the existence of a bulk linear ME vortex structure or a bulk ME coupling such that if P reverses so does M. To measure the predicted ME vortex, we suggest RMnO3 under large magnetic field. We suggest a family of materials, the hexagonal RFeO3 ferrites, also display the predicted phenomena in their ground state.

引用

页数：11

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