多铁性材料BiFeO3的磁学、电学性质及磁电耦合效应  

Magnetism,Ferroelectricity and Magnetoelectric Coupling of Multiferroic BiFeO_3

作　　者：张金星[1] 于浦[2] 

机构地区：[1]北京师范大学物理学系,北京100875 [2]清华大学物理系,低维量子物理国家重点实验室,北京100083

出　　处：《硅酸盐学报》2013年第7期905-915,共11页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金面上项目(11274045;11274194)

摘　　要：磁电多铁性材料中电荷和自旋序参量共存,并相互耦合在一起,产生磁电耦合效应。由于磁电耦合效应在未来高密度、低能耗、高读写速率器件的重要应用前景,近10年来,多铁性材料的研究成为了材料科学以及凝聚态物理领域的热点之一。BiFeO3不仅是为数不多的铁电反铁磁的多铁性材料之一,更难能可贵的是它的铁电Curie温度和反铁磁Néel温度都远高于室温。正因为如此,BiFeO3早在60多年前就受到人们的关注;但是直到2003年高质量外延薄膜的出现,才真正掀起了人们对其卓越性能和新奇物理现象研究的热潮。正是在这个背景下回顾BiFeO3的发展历史,着重介绍近10年此领域的研究成果:从晶体结构、电学性质(巨大铁电极化、电致阻变效应等)、磁学性质(自旋螺旋结构)以及磁电耦合特性等角度,对由BiFeO3多铁性模型体系中衍生出来的新奇物理现象进行详细介绍。最后,就近几年相关领域的研究进行总结和研究展望。The coexistence and coupling of the electric and magnetic order parameters can provide a novel platform to probe magne- toelectric effects in multiferroics. The potential applications of magnetoelectric coupling on future high-density, high-speed and low-energy-cost electronic devices stimulate material scientists and condense matter physicists to revisit multiferroic systems over the past decades. Owing to the high ferroelectric and N6el transition temperatures, BiFeO3 （BFO） appears to be one of the most promising candidates in the on-chip integrated magnetoelectronic devices and attracts people＇s interests since 1960s. Especially, the appearance of high-quality BFO epitaxial thin films in 2003 has triggered the study of its intrinsic properties and physics behind. This article re- views the BFO research history and focuses on the cutting-edge achievements in BFO-related projects in the past decade. We mainly introduce the emerging physical phenomena from the aspects of crystalline structures, electrical/magnetic behaviors and magnetoelec- tric coupling in this multiferroic BFO, accompanying with a brief outlook in the conclusion.

关 键 词：铁酸铋 多铁性 磁电耦合 铁电 反铁磁 

分 类 号：TQ174[化学工程—陶瓷工业]