极性磁体的多铁性研究进展-中国材料进展

文章信息/Info

Title:: Research Progress on Multiferroicity and Magnetoelectric Coupling of Polar Magnets

Author(s):: CHANG Yuting; LU Chengliang; （School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China）

Keywords:: ferromagnetism; ferroelectricity; single=phase multiferroics; polar magnets; magnetoelectric coupling

摘要:: 单相多铁材料同时具有（反）铁磁性、铁电性和铁弹性等两种或两种以上的基本铁性序，并且这些铁性序之间相互耦合，以及外场对其交叉调控产生的新效应，为新型信息多功能器件的设计和开发提供了契机。近年来，一类被称为极性磁体的多铁性材料在很高温度下即可具有非中心对称的特征，出现空间反转对称破缺，展现出丰富的物性，如高温磁电耦合和非互易输运等，成为多铁性研究领域新的关注点。简要总结了已有的极性磁体多铁性材料体系及其中所蕴含的新效应和新物性，并对这一研究分支所面临的挑战作出展望。

Abstract:: The terminology ‘multiferroics’ refers to materials where multiple ferroic orders coexist, i.e. (anti)ferromagnetism, ferroelectricity, and ferroelasticity. The intimate coupling of the ferroic orders, and the cross control of magnetization (electric polarization) by electric (magnetic) fields, provide opportunities for the design and development of conceptually new multifunctional devices. In recent years, an emergent class of multiferroics known as polar magnets have characteristics of non-centrosymmetric and broken of space inversion symmetry at very high temperature, and show interesting physical properties such as magnetoelectric coupling above room temperature and non-reciprocal behavior, which have attracted considerable attention. In this review, we briefly discuss recent research progress of the multiferroicity and magnetoelectric coupling of polar magnets, and try to present several future challenges of this field.