| Y0.125Ca0.875MnO3体系的输运性质与铁磁自旋玻璃行为研究 |
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| 引用本文： | 陈镇平,王春梅,李越峰,苏玉玲,刘德伟,李涛,张金仓. Y0.125Ca0.875MnO3体系的输运性质与铁磁自旋玻璃行为研究[J]. 低温与超导, 2009, 37(5) |
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| 作者姓名： | 陈镇平 王春梅 李越峰 苏玉玲 刘德伟 李涛 张金仓 |
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| 作者单位： | 郑州轻工业学院技术物理系,郑州,450002;上海大学物理系,上海,200444;郑州轻工业学院技术物理系,郑州,450002;上海大学物理系,上海,200444 |
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| 基金项目： | 国家自然科学基金，河南省教育厅自然科学研究计划项目，河南省自然科学基金 |
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| 摘 要： | 研究了类稀土锰氧化物Y0.125Ca0.875MnO3的输运性质和磁特性。结果表明,外加磁场对体系的电输运性能有较大影响,在低温时样品表现出磁电阻效应。在外磁场的诱导下,随温度的降低,体系发生了明显的绝缘-金属(I-M)相变,并且在25K出现了类近藤现象。热磁测量表明零场冷(ZFC)和场冷(FC)的磁化强度曲线在118K出现分叉现象。测量了不同频率下的升降温过程的交流磁化率,结果显示在108K附近出现自旋玻璃态。
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| 关 键 词： | 钙钛矿锰氧化物 绝缘-金属转变 输运特性 自旋玻璃 |
Study on the behaviors of transport properties and ferromagnetic spin-glass for Y_(0.125)Ca_(0.875)MnO_3 manganite |
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| Chen Zhenping,Wang Chunmei,Li Yuefeng,Su Yuling,Liu Dewei,Li Tao,Zhang Jincang. Study on the behaviors of transport properties and ferromagnetic spin-glass for Y_(0.125)Ca_(0.875)MnO_3 manganite[J]. Cryogenics and Superconductivity, 2009, 37(5) |
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| Authors: | Chen Zhenping Wang Chunmei Li Yuefeng Su Yuling Liu Dewei Li Tao Zhang Jincang |
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| Affiliation: | 1.Department of Technology and Physics;Zhengzhou University of Light Industry;Zhengzhou 450002;China;2.Department of Physics;Shanghai University;Shanghai 200444;China |
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| Abstract: | The transport properties and magnetic properties for the rare-earth-like Y0.125Ca0.875MnO3 manganese are systemically studied.The results show that the magnetic field has a stronger impact on electric transport properties for the system,and at low temperature the sample exists a considerable magnetoresistance(MR) effect.At an applied field,the system occurs I-M phase transition obviously with decreasing temperature,and there exists a Kondo-like behavior at 25K.The magnetization measurements show an onset of... |
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| Keywords: | Perovskite manganese Insulator-metal transition Transport properties Spin-glass |
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