钙钛矿钴氧化物中钴离子自旋态的研究进展  

Spin States of Cobalt Ion in Perovskite Cobalt Oxides

作　　者：赵若禺[1] 毋志民[1] 王敏娣[1] 邓军权 丁水燕 

机构地区：[1]重庆师范大学物理与电子工程学院光电功能材料重庆市重点实验室,重庆401331

出　　处：《材料导报》2015年第9期146-151,共6页Materials Reports

基　　金：国家自然科学基金(61201119);教育部科学技术重点项目(211152);重庆市自然科学基金重点项目(cstc2013jjB0155);重庆市基础与前沿研究计划项目(cstc2014jcyjA50005);重庆市教委科技项目(KJ110634)

摘　　要：钙钛矿钴氧化物具有丰富的物理现象,特别是其Co离子自旋态的变化更为复杂,蕴藏着丰富的物理机理。由于材料本身存在的庞磁电阻效应使其在提高磁存储密度和制备磁敏感探测元件等领域有着很广阔的应用前景,受起了广泛关注。从介绍钙钛矿氧化物的结构入手,着重阐述了钙钛矿钴氧化物中Co离子自旋态转变的研究进展,并对钙钛矿钴氧化物中存在的其他物性进行了简单综述。Perovskite cobalt oxides exhibit abundant physical phenomena, especially the Co ion spin-state tran- sition which is much more complex and implies various physical mechanisms. The discovery of colossal magnetoresis- tance effect （CMR） in these materials has sparked considerable renewed interests with an eye towards both on under- standing of the CMR and related properties and potential applications in magnetic information storage and low-field magnetic sensors. An introduction of the structure of perovskite cobalt oxide, followed by a detailed description about the research progress of Co ion spin-state transition, are presented. Meanwhile, the other physical properties are re- viewed briefly.

关 键 词：钙钛矿钴氧化物 钴离子 自旋态 庞磁电阻效应 

分 类 号：TB34[一般工业技术—材料科学与工程] O472[理学—半导体物理]