| Multiple sign reversals of the exchange bias field in polycrystalline SmCr_（0.9）Fe_（0.1）O_3 |
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| 引用本文： | 胡春莲 廖棱 Stamps R 房勇 颜士明 龚元元 朱卫利 曹庆琪 王敦辉 都有为.Multiple sign reversals of the exchange bias field in polycrystalline SmCr_（0.9）Fe_（0.1）O_3[J].中国物理 B,2014(12):453-457. |
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| 作者姓名： | 胡春莲 廖棱 Stamps R 房勇 颜士明 龚元元 朱卫利 曹庆琪 王敦辉 都有为 |
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| 作者单位： | Jiangsu Key Laboratory for Nano Technology and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China |
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| 基金项目： | Project supported by the National Basic Research Program of China（Grant Nos.2014AA032904 and 2009CB929501）; the National Natural Science Foundation of China（Grant Nos.11174130 and U1232210） |
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| 摘 要： | We synthesize the perovskite compound Sm Cr0.9Fe0.1O3 by the sol–gel method and investigate its exchange bias properties through thermomagnetic and isothermal magnetization measurements. The sign reversals of the exchange bias field are observed at the magnetization compensation temperatures 29.6 K and 96.2 K. It is demonstrated that the occurrence of the exchange bias originates from the antiferromagnetic coupling between the Cr-rich and Fe–Cr regions, of which the net magnetization is temperature-dependent. These results imply that there are potential applications in single systems with sign reversals of both magnetization and exchange bias.
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| 关 键 词： | 交换偏置场 反转 Fe 磁化强度 钙钛矿化合物 反铁磁耦合 温度依赖性 补偿温度 |
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