[1]贾君茹,韩立安.La0.7Sr0.3MnO3薄膜的溶胶凝胶法制备及电特性研究[J].西安科技大学学报,2006,(03):370-371375.
 JIA Jun-ru,HAN Li-an.Fabrication and electric properties of La0.7Sr0.3MnO3 thin film by sol-gel method[J].Journal of Xi'an University of Science and Technology,2006,(03):370-371375.
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La0.7Sr0.3MnO3薄膜的溶胶凝胶法制备及电特性研究()
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2006年03期
页码:
370-371375
栏目:
出版日期:
2006-09-29

文章信息/Info

Title:
Fabrication and electric properties of La0.7Sr0.3MnO3 thin film by sol-gel method
文章编号:
1672-9315(2006)03-0370-02
作者:
贾君茹1韩立安2
1.陕西能源职业技术学院基础部,陕西 咸阳 712000; 2.西安科技大学 基础部,陕西 西安 710054
Author(s):
JIA Jun-ru1HAN Li-an2
1.Dept. of Basic Courses, Shaanxi Energy Vocational and Technical Institute,Xianyang 712000, China 2.Dept. of Basic Courses, Xi'an University of Science and Technology, Xi'an 710054, China
关键词:
薄膜 La0.7Sr0.3MnO3 溶胶凝胶法 电特性
Keywords:
thin film La0.7 Sr0.3 MnO3 sol-gel electric property
分类号:
O482
文献标志码:
A
摘要:
利用溶胶凝胶法在单晶LaAlO3(100)衬底上成功的外延生长了La0.7Sr0.3MnO3薄膜。用X射线衍射、直流四探针法对其进行了研究。结果表明,薄膜为赝立方钙钛矿结构,晶胞参数为a=3.872 nm,具有良好的单晶外延结构。电阻率随着温度的增加,从金属导电行为向绝缘体行为转变,利用双交换理论对此现象作了合理的解释,转变点温度为TMI=340K。其电阻率在TTMI时满足ρ=ρ01T2,其导电机制是电子与电子的散射,在T>TMI时主要是小极化子输运。
Abstract:
Using sol-gel method, La0.7Sr0.3MnO3 thin films have been grown on(100)LaAlO3single-crystal substrates. The thin film was characterized by X ray diffraction, direct current four probe method. The results show that the thin film have a pseudo-cubic perovskite structure with the cell parameter a=3.872 nm, plus the good epitaxialdirection. There is a transition from the metal to insulator with the temperature increment, a reasonable introduction is given to the fact by double interaction theory. The transition temperature is 340 K. The transport results show that the data is satisfied with ρ=ρ01T2for the range of TTMI, the metal conductivity mechanism is electron versus electron scatting, the insulator conductivity mechanism is small polaron.

参考文献/References:

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相似文献/References:

[1]韩立安,杨华平.钙钛矿La0.67Pb0.33MnO3薄膜的制备及表征[J].西安科技大学学报,2007,(01):143.[doi:10.3969/j.issn.1672-9315.2007.01.031]
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备注/Memo

备注/Memo:
收稿日期:2005-10-01 作者简介:贾君茹(1963—),女,陕西三原人,讲师,主要从事物理教学与物理学研究工作.
更新日期/Last Update: 2006-09-29