| Charge disproportionation induced exchange bias in La0.5Ca0.5FeO3-δ |
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| 作者姓名： | LIANG YaQiong ZHANG XiangQun JIN JinLing ZHAN QingFeng CHENG ZhaoHua |
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| 作者单位： | Logistic School,Beijing Wuzi University;State Key Laboratory of Magnetism,Institute of Physics,Chinese Academy of Sciences;Key Laboratory of Magnetic Materials and Devices,Ningbo Institute of Material Technology and Engineering,Chinese Academy of Sciences |
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| 基金项目： | 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 |
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| 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.
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| 关 键 词： | exchange bias charge disproportionation cluster glass |
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