高等学校化学学报

高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (5): 665.

• 论文 •    下一篇

Sol-gel法制备La1-xSrxMnO3巨磁电阻薄膜材料

张志力, 王哲明, 黄云辉, 程福祥, 廖春生, 高松, 严纯华   

  1. 北京大学稀土材料化学与应用国家重点实验室, 北京 100871
  • 出版日期:1999-05-24 发布日期:1999-05-24
  • 通讯作者: 严纯华
  • 作者简介:张志力,女,30岁,硕士,讲师,南昌航空工业学院访问学者.
  • 基金资助:

    国家自然科学基金(批准号:29701001,29831010);攀登计划和规划项目;国家杰出青年基金;教育部博士点基金;北大方正基金

Giant Magnetoresistive Nanocrystalline Films of La1-xSrxMnO3Prepared by Sol gel Method

ZHANG Zhi-Li, WANG Zhe-Ming, HUANG Yun-Hui, CHENG Fu-Xiang, LIAO Chun-Sheng, GAO Song, YAN Chun-Hua   

  1. State Key Laboratory of Rare Earth Materials Chemistry and Applications, Peking University, Beijng, 100871
  • Online:1999-05-24 Published:1999-05-24

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摘要： 利用sol-gel法在单晶硅Si(100)衬底上,制备了钙钛矿La1-xSrxMnO3(LSMO)低织构纳米晶薄膜.考察了制备条件对LSMO成相、晶粒的粒度和表面形貌的影响,研究了其磁特性和磁电阻性能.结果表明,La0.7Sr0.3MnO3薄膜磁电阻效应在相当宽的温度范围内不随温度改变,在6T磁场中室温下磁电阻比MR值可达-30%.

关键词: sol-gel法, 钙钛矿, 纳米晶薄膜, 巨磁电阻

Abstract: The nanocrystalline films of perovskite like manganites La1-xSrxMnO3(LSMO, x= 0～0.6 ) on the single silicon(100) substrates have been fabricated by sol gel method. The annealing dependence of the phase formation, grain size and film morphorlogy have been investigated. The measurement on the magnetoresistance of the films with standard four electrode method shows a widened peak of resistance for each sample due to the boundary effect and a MR value of about -30% at room temperature in6Tmagnetic field for the sample La0.7Sr0.3MnO3.

Key words: So-gel method, Perovskite, Nanocrystalline films, Giant magnetoresistance

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