Structural and magnetic characterization of LaSrMnO3 thin films deposited by laser ablation on MgO substrates

被引：17
|
作者：
Gomes, I. T. [1 ]
Almeida, B. G. [1 ]
Lopes, A. M. L. [2 ,3 ]
Araujo, J. P. [2 ,3 ]
Barbosa, J. [1 ]
Mendes, J. A. [1 ,4 ]
机构：
[1] Univ Minho, Dept Fis, P-4710057 Braga, Portugal
[2] Univ Porto, Dept Fis, P-4169007 Oporto, Portugal
[3] Univ Porto, IFIMUP, P-4169007 Oporto, Portugal
[4] Inst Politecn Porto, ESEIG, P-4480876 Vila Do Conde, Portugal
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2010年 / 322卷 / 9-12期
关键词：
LSMO thin films; Under-oxidized; Structure; Electrical properties; Magnetic properties; X-Ray reflectivity;
D O I：
10.1016/j.jmmm.2009.06.072
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
La2/3Sr1/3MnO3-delta thin films were deposited by laser ablation on MgO substrates under low oxygen pressure cool down. Their structural and magnetic properties are presented. The magnetic and electrical resistivity measurements indicate a reduction of the Curie and the metal-insulator transition temperatures due to the formation of magnetic inhomogeneneous films, where clusters of a metallic phase are mixed in a magnetically disordered insulating matrix. By a low-angle X-ray reflectivity study we show that the thin films are chemically inhomogeneous with an oxygen deficiency in bulk of the film when compared with the film/air interfacial region. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码：1174 / 1177
页数：4
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