六方相YMnO₃中反铁磁畴壁的结构与相互作用

Structure and interaction of antiferromagnetic domain walls in hexagonal YMnO3.

作者信息

Goltsev A V, Pisarev R V, Lottermoser Th, Fiebig M

机构信息

Ioffe Physical Technical Institute of the Russian Academy of Sciences, 194021 St. Petersburg, Russia.

出版信息

Phys Rev Lett. 2003 May 2;90(17):177204. doi: 10.1103/PhysRevLett.90.177204.

DOI:10.1103/PhysRevLett.90.177204

PMID:12786100

Abstract

The structure of antiferromagnetic (AFM) domain walls and their interaction with lattice strain are derived taking the multiple-order-parameter compound YMnO3 as a model example. Contrary to the conviction that AFM domain walls are energetically unfavorable, their interaction with lattice strain lowers the total energy of the system and leads to a piezomagnetic clamping of the electric and magnetic order parameters in good agreement with the available experimental data.

摘要

以多序参量化合物YMnO₃为模型示例，推导了反铁磁（AFM）畴壁的结构及其与晶格应变的相互作用。与认为AFM畴壁在能量上不利的观点相反，它们与晶格应变的相互作用降低了系统的总能量，并导致电序参量和磁序参量的压磁钳制，这与现有实验数据高度吻合。