Multiferroics and magnetoelectric effects in charge ordered compounds  

作　　者：SUN Young YAN LiQin CONG JunZhuang 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences

出　　处：《Science China(Physics,Mechanics & Astronomy)》2013年第1期222-231,共10页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11074293,51021061 and 50831006)

摘　　要：The coexistence of magnetic ordering and ferroelectricity, ing on the origin of ferroelectricity, multiferroic materials known as multiferroics, has drawn a lot of research effort. Depend can be classified into different groups. In this paper, we review re cent progress in the field of multiferroics induced by different forms of charge ordering. In addition to a general description of charge order and electronic ferroelectricity, we focus on two specific systems： （1） charge order with frustration in RFe2O4 （R=Lu, Yb） system; （2） charge ordered perovskite manganites of the type （R1-xCax）MnO3 （R=La, Pr）. The charge ordering can be tuned by external electric fields, which results in pronounced magnetoelectric effects and strong dielectric tunability. Other materials and possible candidates with charge order induced multiferroics are also briefly summarized.The coexistence of magnetic ordering and ferroelectricity,known as multiferroics,has drawn a lot of research effort.Depending on the origin of ferroelectricity,multiferroic materials can be classified into different groups.In this paper,we review recent progress in the field of multiferroics induced by different forms of charge ordering.In addition to a general description of charge order and electronic ferroelectricity,we focus on two specific systems:(1) charge order with frustration in RFe2O4(R=Lu,Yb) system;(2) charge ordered perovskite manganites of the type(R1xCax)MnO 3(R=La,Pr).The charge ordering can be tuned by external electric fields,which results in pronounced magnetoelectric effects and strong dielectric tunability.Other materials and possible candidates with charge order induced multiferroics are also briefly summarized.

关 键 词：MULTIFERROICS charge order magnetoelectric effects 

分 类 号：O469[理学—凝聚态物理] TB321[理学—电子物理学]