Sr2FeMoO6+x:: Magnetic and electrical property dependence on thickness and substrate type

被引:7
作者
Boucher, R [1 ]
机构
[1] Inst Phys High Technol, D-07745 Jena, Germany
关键词
double perovskite; half metal; magnetic properties; electrical properties;
D O I
10.1016/j.jmmm.2005.12.003
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We have produced a series of Sr2FeMoO6+x films from 15 to 240 rim thick oil MgO, LaAlO3, Sr0.5Ba0.5TiO3, and SrTiO3 substrates and measured their electrical and magnetic properties. It is clear that as the nominal lattice mismatch increases the magnetisation decreases and when the mismatch is small there is no dependence of the magnetisation on the film thickness for films above 30 nm thick. Evidence for a thin antiferromagnetic (AF) rich interface layer in the thinner films on Sr0.5Ba0.5TiO3 and SrTiO3 comes from the magnetisation data, but a clear influence is seen in the electrical dependence on temperature. However, for the 120 and 240 nm thick films there is little evidence of this AF layer, and an almost universal conduction mechanism is seen. This mechanism applies also to the 240 nm thick films oil LaAlO3 and can also explain the observed magnetoresistance. Films oil MgO show evidence of the often seen re-organised layer at the film/substrate interface. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:251 / 257
页数:7
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