| La2/3Ca1/3MnO3中的输运机制与CMR效应 |
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| 引用本文： | 彭振生.La2/3Ca1/3MnO3中的输运机制与CMR效应[J].中国稀土学报,2003,21(6):664-667. |
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| 作者姓名： | 彭振生 |
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| 作者单位： | 宿州师范专科学校物理系,安徽,宿州,234000 |
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| 基金项目： | 国家自然科学基金重点项目(19934003)，国家重点基础研究发展规划项目(001CB610604) |
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| 摘 要： | 研究了超大磁阻材料La2/3Ca1/3MnO3的磁电特性，发现由电阻测量得到的绝缘体．金属相变与由磁化曲线得到的顺磁-铁磁相变温区完全一致，均随磁场的增强推向高温区。结果证明样品输运行为的变化起因于磁结构的变化，在Tc附近产生超大巨磁电阻效应。
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| 关 键 词： | 凝聚态物理 绝缘体-金属相变 超大磁阻效应 顺磁-铁磁相变 稀土 La2／3Ca1／3MnO3 输运机制 CMR效应 超大磁阻材料 |
| 文章编号： | 1000-4343(2003)06-0664-04 |
| 修稿时间： | 2003年5月30日 |
Transport Properties and CMR Effect in La2/3Ca1/3MnO3 |
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| Peng Zhensheng.Transport Properties and CMR Effect in La2/3Ca1/3MnO3[J].Journal of the Chinese Rare Earth Society,2003,21(6):664-667. |
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| Authors: | Peng Zhensheng |
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| Institution: | Peng Zhensheng~* |
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| Abstract: | The magnetic and electrical transport properties of the colossal magnetoresistance material La_(2/3)Ca_(1/3)MnO_3 were studied. It is found that the insulator-metal transition is well consistent with the paramagnetic-ferromagnetic transition, and shits to higher temperature with increasing applied magnetic field. These results suggest that the transport properties are triggered by the magnetic structure transition and consequently resulting in a CMR near T_C. |
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| Keywords: | condensed physics insulator-metal transition colossal magnetoresistance effect paramagnetic-ferromagnetic transition rare earths |
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