Journal
MATERIALS LETTERS
Volume 64, Issue 15, Pages 1713-1716Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2010.04.059
Keywords
Multiferroic materials; Magnetoresistance; Photoconductivity
Funding
- NPU Foundation for Fundamental Research [NPU-FFR-JC200821]
- National Natural Science Foundation of Chain [50331040]
- Northwestern Polytechnical University
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In this letter, an oxide heterostructure has been fabricated by successively growing La0.7Sr0.3MnO3 (LSMO) and BiFeO3 (BFO) layers on LaAlO3 (100) by pulsed laser deposition. Analysis of the leakage current at different temperature demonstrated that the Poole-Frenkel dominated the leakage current mechanism. Additionally, the BiFeO3/LaO3Sr0.3MnO3 heterostructure exhibits a positive colossal magnetoresistance (MR) effect over a temperature range of 50-320 K. The maximum MR values are determined to be about 45.32% at H = 0.5 T and 28.34% at H = 0.3 T. At last, we report photoconductivity in BiFeO3/La0.3Sr0.3MnO3 film under illumination from 160 mW/cm(2) and 200 mW/cm(2) green-light source, and photoconductivities increase with the intensity of light enhanced. (C) 2010 Elsevier B.V. All rights reserved.
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