Isoelectronic and electronic doping in Sr2FeMoO6

被引：6

作者：

Hemery, E. K.

Williams, G. V. M.

Trodahl, H. J.

机构：

[1] Ind Res Ltd, Wellington, New Zealand

[2] Univ Victoria, MacDiarmid Inst Adv Mat & Nanotechnol, Wellington, New Zealand

[3] Ind Res Ltd, Lower Hutt, New Zealand

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2007年 / 310卷 / 02期

关键词：

double perovskite; thermoelectric power; magnetoresistance;

D O I：

10.1016/j.jmmm.2006.10.869

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the results from transport and magnetic measurements on Sr2-xLaxFeMoO6 and Sr2-xBaxFeMoO6. The temperature and electronic doping dependence of the thermoelectric power of Sr2-xLaxFeMoO6 is remarkably similar to that observed in the superconducting cuprates. The low-field magneto-resistance decreases with increasing La concentration and we show that it can be modeled by a grain boundary magnetization that is different from the bulk magnetization. The maximum negative magneto-resistance (similar to -25% at 0.8 T) occurs in the Ba2FeMoO6 sample that has the largest resistivity. (c) 2006 Elsevier B.V. All rights reserved.

引用

收藏

页码：1958 / 1960

页数：3

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