| Co和Cr掺杂对层状钙钛矿锰氧化物La1.2Sr1.8Mn2O7磁性的影响 |
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| 引用本文： | 张 军,严启伟,王芳卫,袁 鹏,张泮霖.Co和Cr掺杂对层状钙钛矿锰氧化物La1.2Sr1.8Mn2O7磁性的影响[J].物理学报,1999,48(13):68-73. |
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| 作者姓名： | 张 军 严启伟 王芳卫 袁 鹏 张泮霖 |
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| 作者单位： | 中国科学院物理研究所与凝聚态物理中心磁学国家重点实验室，北京 100080 |
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| 摘 要： | 研究了层状钙钛矿锰氧化物La1.2Sr1.8Mn2O7中Mn被Co和Cr替代对磁性能的影响.Co替代Mn后，长程铁磁序被破坏，铁磁性减弱，出现团簇玻璃态和自旋玻璃态，表明Co离子和Mn离子之间不存在双交换作用.而Mn被Cr替代后长程铁磁序仍然保持，证实Cr3+和Mn3+之间存在铁磁性交换作用.
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| 收稿时间： | 1999-06-10 |
Effect of Co and Cr Substitution on the Magnetic Properties of Layered Perovskite Manganese Oxide La1.2Sr1.8Mn2O7 |
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| Zhang Jun,Yan Qi-Wei,Wang Fang-Wei,Yuan Peng and Zhang Pao-Lin.Effect of Co and Cr Substitution on the Magnetic Properties of Layered Perovskite Manganese Oxide La1.2Sr1.8Mn2O7[J].Acta Physica Sinica,1999,48(13):68-73. |
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| Authors: | Zhang Jun Yan Qi-Wei Wang Fang-Wei Yuan Peng and Zhang Pao-Lin |
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| Abstract: | The effect of substituting Mn by Co and Cr on the magnetic properties of layered perovskite manganese oxide La1.2Sr1.8Mn2O7 is investigated. Co doping results in the frustration of long-range ferromagnetic (FM) order, weakening of ferromagnetism, and occurring of cluster-glass and spinglass state, indicating that no double-exchange interaction occurs between Co and Mn ions. However, the long-randge FM order still exists as Mn is replaced by Cr, which verifies that there is FM interaction between Mn3+ and Cr3+. |
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