La_(0.67)Ca_(0.33)MnO_3多晶的本征和非本征磁电阻  

INTRINSIC AND NON INTRINSIC MAGNETORESISTANCE IN BULK POLYCRYSTALLINE La 0.67 Ca 0.33 MnO 3

作　　者：周圣明[1] 朱弘[1] 熊曹水[1] 石磊[1] 周贵恩[1] 张裕恒 

机构地区：[1]中国科学技术大学结构分析开放实验室

出　　处：《低温物理学报》1998年第5期321-325,共5页Low Temperature Physical Letters

基　　金：中国科学院重大资助

摘　　要：研究了不同烧结温度的Ｌａ０．６７Ｃａ０．３３ＭｎＯ３多晶块材的电磁输运特性．在ρ～Ｔ曲线上居里温度Ｔｃ以下的温区，观察到一个宽化的峰．讨论了Ｔｃ附近及其以下的本征和非本征磁电阻效应并将它们分解开来．Abstract The electric and magnetic transport properties for bulk polycrystalline La 0.67 Ca 0.33 MnO 3 sintered at different temperatures have been investigated. A broad peak has been observed in ρ～T curve below T c . The intrinsic and non intrinsic magnetoresistance effect has been discussed and decomposed near and below T c .

关 键 词：LCMO 多晶块材 本征 非本征 磁电效应 

分 类 号：O734[理学—晶体学] O513