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。
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.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2003年第6期664-667,共4页
Journal of the Chinese Society of Rare Earths
基金
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)
