Charge disproportionation induced exchange bias in La_(0.5)Ca_(0.5)FeO_(3-δ)

查看全文 作　　者：LIANG [1,2]YaQiong;ZHANG [2]XiangQun;JIN [2]JinLing;ZHAN [3]QingFeng;CHENG [2]ZhaoHua

机构地区：[1]Logistic School,Beijing Wuzi University;[2]State Key Laboratory of Magnetism,Institute of Physics,Chinese Academy of Sciences;[3]Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences

出　　处：《Science China(Physics,Mechanics & Astronomy)》索引2013年第56卷第11期,共5页

基　　金：supported by the National Basic Research Program of China;the National Natural Sciences Foundation of China(Grant No.11205015);the Natural Sciences Foundation of Beijing(Grant No.1113017);Beijing Area Logistics System&Technology Major Laboratory and the Logistics Management and Engineering Innovation Platform of Beijing Wuzi University 摘　　要：We observed an exchange bias effect in La0.5Ca0.5FeO3 perovskite compound.The exchange bias is associated with the charge disproportionation transition from Fe4+ions to Fe3+and Fe5+ions below 175 K.The competition between the ferromagnetic interaction of Fe3+and Fe5+ions and the antiferromagnetic one of Fe3+and Fe3+ions results in a unidirectional anisotropy in the cluster-glass system.An antiferromagnetically interfacial exchange coupling constant Ji1.95 meV at the cluster-glass region was yielded by fitting the cooling field-dependence of the exchange bias field. 关键词：交换偏置场歧化充电钙钛矿化合物铁磁相互作用玻璃系统各向异性耦合常数

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Charge disproportionation induced exchange bias in La_(0.5)Ca_(0.5)FeO_(3-δ)

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