高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (2): 165.

• 论文 •    下一篇

在温和条件下巨磁阻材料La0.5Ba0.5MnO3的水热合成与表征

王丹, 于然渡, 冯守华, 郑文君, 庞广生, 赵辉   

  1. 吉林大学化学系无机合成与材料制备开放实验室, 长春, 130023
  • 收稿日期:1997-05-20 出版日期:1998-02-24 发布日期:1998-02-24
  • 通讯作者: 冯守华
  • 作者简介:王丹,男,28岁,硕士研究生.
  • 基金资助:

    国家自然科学基金资助课题(29731010).

Hydrothermal Synthesis of a Giant Magnetoresistance Material La0.5Ba0.5MnO3 Under Mild Conditions

WANG Dan, YU Ran-Bo, FENG Shou-Hua, ZHENG Wen-Jun, PANG Guang-Sheng, ZHAO Hui   

  1. Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Department of Chemistry, Jilin University, Changchun, 130023
  • Received:1997-05-20 Online:1998-02-24 Published:1998-02-24

摘要: 报道了在温和条件下巨磁阻材料La0.5Ba0.5MnO3的水热合成.系统地研究了原料配比、碱度、时间和温度对产物合成的影响,在最佳合成条件下得到了结晶度较高的纯相,并通过XRD、DTA-TG、化学分析及碘量法对产物进行了表征.该化合物属立方晶系,晶胞参数为α=0.3913nm,V=0.05990nm3,Mn的平均价态为3.5,在1T的外磁场下,磁阻比(MR)的极大值为29%.

关键词: La0.5Ba0.5MnO3, 水热合成, 巨磁阻

Abstract: Agiant magnetoresistance material La0.5Ba0.5MnO3 was prepared by hydrothermal method at 240 ℃ for 24 hours. The product was characterized by X-ray powder diffraction, differential thermal analysis-thermogravimetric analysis, chemical analysis, and iodometry. The compound crystallizes in a cubic system with cell parameters a =0.3913 nm and V =0.05990 nm3. The average valence state of manganese was 3.5, and the magnetoresistance (MR) is about 29% at 1 T.

Key words: La0.5 Ba0.5 MnO3, Hydrothermal systhesis, Giant magnetoresistance

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