Y0.75Ca0.25MnO3体系的自旋玻璃行为与输运特性研究

功能材料, 2007, 38(1): 43-46.

Y0.75Ca0.25MnO3体系的自旋玻璃行为与输运特性研究

李越峰 ^1, , 张玉凤 ^2, , 曹世勋 ^3, , 敬超 ^4, , 张金仓 ^5,

1.上海大学,物理系,上海,200444

2.上海大学,物理系,上海,200444

3.上海大学,物理系,上海,200444

4.上海大学,物理系,上海,200444

5.上海大学,物理系,上海,200444

基金项目: 上海市自然科学基金(04JC14039) 教育部高等学校博士学科点专项科研基金(20050280004) 上海市重点学科建设项目(T0104) 国家自然科学基金(10574087)

关键词：钙钛矿锰氧化物 , 自旋玻璃 , 不可逆性

Spin-glass behavior and transport properties for Y0.75Ca0.25MnO3 system

研究了Y0.75Ca0.25MnO3体系的结构和电磁特性,结果表明,场冷(FC)和零场冷(ZFC)直流磁化曲线在低温下存在典型的分叉现象,相应的Tcusp=34K;不同频率下交流磁化测量表明了随着频率的增加自旋冻结温度Tf=Tcusp向高温区移动,结合电输运测量,证明Y0.75Ca0.25MnO3体系为一典型的自旋玻璃绝缘(SGI)体系.

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Y0.75Ca0.25MnO3体系的自旋玻璃行为与输运特性研究

Spin-glass behavior and transport properties for Y0.75Ca0.25MnO3 system

参考文献