Preparation of La0.7Sr0.3MnO3 single-crystal epitaxial films and their magnetoresistance properties

被引：0
作者：
机构：
[1] Key Laboratory of Magnetic Levitation Technologies and Maglev Trains, Southwest Jiaotong University
[2] Superconductivity and New Energy Center, Southwest Jiaotong University
[3] School of Materials Science and Engineering, University of New South Wales
来源：
Yang, X. (yzhao@swjtu.edu.cn) | 1600年 / Science Press卷 / 48期
关键词：
Buffer layer; Chemical solution deposition; Colossal magnetoresistance; Perovskite;
D O I：
10.3969/j.issn.0258-2724.2013.05.028
中图分类号：
学科分类号：
摘要：
In order to obtain high quality single La0.7Sr0.3MnO3 (LSMO) buffer layers and study their low-field magnetoresistance (MR), a series of epitaxial films of perovskite manganites La0.7Sr0.3MnO3 (LSMO) deposited on the LaAlO3 (LAO) single crystal substrates were fabricated by the polymer-assisted chemical solution deposition method. Taking into account the influences of argon and oxygen annealing atmosphere on the LSMO phase formation, investigations were conducted on the surface morphology and texture of the specimens annealed in argon and the transport properties and colossal magnetoresistance (CMR) effect of the specimens annealed in oxygen. The results show that thick and high quality single LSMO buffer layers can be produced at low costs by the polymer-assisted chemical solution deposition method and annealing in argon atmosphere. The films fabricated in oxygen are found with good c-axis textured, and the MR measurements of the films shows a peak, corresponding to the insulator-metal (I-M) transition. The MR value does not change with the temperature between 200 to 300 K, and is about -26.0% at room temperature in 1 T magnetic field.
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页码：961 / 967
页数：6
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