高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1304.

• 论文 • 上一篇    下一篇

自掺杂La1-δMn1-δO3化合物的晶体结构和巨磁电阻效应

鲜于文旭1, 千正男1, 李宝河2, 王向群1, 赵铁松1   

  1. 1. 吉林大学物理系, 长春, 130023;
    2. 北京轻工业学院, 北京, 100037
  • 收稿日期:1997-06-25 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 赵铁松
  • 作者简介:鲜于文旭,男,30岁,博士研究生.
  • 基金资助:

    国家教育委员会留学归国人员基金资助课题.

Crystal Structure and Colossal Magnetoresistance of Self doped La1-δ Mn1-δ O3Compounds

XIANYU Wen-Xu1, QIAN Zheng-Nan1, LI Bao-He2, WANG Xiang-Qun1, ZHAO Tie-Song1   

  1. 1. Dept. of Phys., Jilin University, Changchun, 130023;
    2. Beijing Light Industry College, Beijing, 100037
  • Received:1997-06-25 Online:1998-08-24 Published:1998-08-24

PDF (PC)

摘要： 采用溶胶-凝胶工艺制备了La1-δMn1-δO3化合物.研究了烧结条件的改变对材料的结构、磁性、导电性、磁电阻效应的影响.首次发现La1-δMn1-δO3化合物的电阻-温度曲线的双峰现象.

关键词: 巨磁电阻效应, 金属－绝缘体转变, 溶胶－凝胶工艺, 双交换作用

Abstract: La1-δ Mn1-δ O3compounds were prepared by the sol-gel technique. The effect of sintered condition on the crystal structure, magnetic property, conductivity and magnetoresistance for La1-δMn1-δO3was investigated. It was found, for the first time, that there exist two peaks in the R-T curve for the sample sintered at 1473 Kfor 24 hours.

Key words: Colossal magnetoresistance(CMR), Metal-insulator transition, Sol-gel technique, Double exchange interaction

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