標題: Magnetoresistance of La0.7Ca0.3MnO3 thin film biepitaxial step junctions
作者: Chen, SF
Chang, WJ
Liu, SJ
Juang, JY
Lin, JY
Wu, KH
Uen, TM
Gou, YS
電子物理學系
物理研究所
Department of Electrophysics
Institute of Physics
關鍵字: magnetoresistance;biepitaxial step junction;LCMO;grain boundary
公開日期: 1-Aug-2003
摘要: The biepitaxial La0.7Ca0.3MnO3 (LCMO) thin films grown on SrTiO3 substrates using a buffer layer of anatase TiO2 were fabricated. The magnetoresistance (MR) of biepitaxial step junction (BSJ) across the boundary layer of biepitaxial LCMO (0 0 1) and LCMO (I 10) film was investigated. The temperature and field dependence of MR for BSJ are qualitatively similar to those obtained in other type of artificial grain boundaries with a comparable MR ratio at low temperatures. However, the observed linear current-voltage characteristic across BSJ is in sharp contrary to the commonly reported non-ohmic characteristics. The results are consistent with features predicted by the model of spin-dependent transport across a depressed magnetic ordering and metallic-like junction layer. (C) 2003 Elsevier Science B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/S0921-4526(03)00261-8
http://hdl.handle.net/11536/27663
ISSN: 0921-4526
DOI: 10.1016/S0921-4526(03)00261-8
期刊: PHYSICA B-CONDENSED MATTER
Volume: 336
Issue: 3-4
起始頁: 267
結束頁: 274
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