Growth control of stoichiometry in LaMnO3 epitaxial thin films by pulsed laser deposition

被引:38
|
作者
Marton, Zsolt [1 ,2 ]
Seo, Sung Seok A. [1 ]
Egami, Takeshi [1 ,3 ,4 ]
Lee, Ho Nyung [1 ]
机构
[1] Oak Ridge Natl Lab, Div Mat Sci & Technol, Oak Ridge, TN 37831 USA
[2] Univ Penn, Dept Mat Sci & Engn, Philadelphia, PA 19104 USA
[3] Univ Tennessee, Dept Phys & Astron, Knoxville, TN 37996 USA
[4] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA
关键词
Laser epitaxy; Oxides; Perovskites; Magnetic materials; GAS; MN;
D O I
10.1016/j.jcrysgro.2010.07.013
中图分类号
O7 [晶体学];
学科分类号
0702 ; 070205 ; 0703 ; 080501 ;
摘要
We have studied structural, magnetic, and optical transport properties of LaMnO3 (LMO) thin films grown on SrTiO3. While the stoichiometric LMO is an insulating antiferromagnet, it tends to be a ferromagnetic insulator when grown as thin films. By exploring the majority of growth parameters, we have found that the bulk-like electronic and magnetic phases can be stabilized by growing thin films under reducing atmospheres and by using more energetic laser processes. These conditions are found to reduce the La deficiency in the film resulting in the greatly improved cation stoichiometry. Since oxides are prone to reduce the oxygen content and to alter the cation ratio under such growth conditions, it suggests that the cation and oxygen stoichiometries in complex oxide thin films can be improved by properly optimizing the growth parameters. (C) 2010 Elsevier By. All rights reserved.
引用
收藏
页码:2923 / 2927
页数:5
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