Structural, magnetic and transport properties of Sr2Fe1-xMgxMoO6 (0≤x≤1) double perovskites

被引：40

作者：

Sher, F

Venimadhav, A

Blamire, MG

Dabrowski, B

Kolesnik, S

Attfield, JP

机构：

[1] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh EH9 3JZ, Midlothian, Scotland

[2] Univ Edinburgh, Sch Chem, Edinburgh EH9 3JZ, Midlothian, Scotland

[3] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[4] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England

[5] No Illinois Univ, Dept Phys, De Kalb, IL 60115 USA

[6] PIEAS, Dept Chem & Mat Engn, Nilore, Islamabad, Pakistan

来源：

SOLID STATE SCIENCES | 2005年 / 7卷 / 08期

基金：

英国工程与自然科学研究理事会; 美国国家科学基金会;

关键词：

double perovskite; Sr2FeMoO6; magnetization; magnetoresistance; CMR;

D O I：

10.1016/j.solidstatesciences.2005.03.002

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of Sr2Fe1-xMgxMoO6 (0 <= x <= 1) double perovskite oxides have been prepared and their crystal, magnetic and transport properties. studied. Rietveld refinements, in tetragonal space group 14/m, show an almost complete B-cation ordering in the doped samples. A systematic decrease in Curie temperature, T-C and saturation magnetization, MS with increase of x has been observed in this solid solution series. Resistivities show a semiconducting behavior for all samples and increase with x. The x = 0 sample becomes metallic above a metal-insulator transition temperature of 45 K in applied fields of 30 and 50 kOe. Negative colossal magnetoresistances (CMR) have been observed (up to 47% for the x = 0.6 sample at 5 K) in all the samples and these MR effects show a strong dependence on the microstructural nature (grain boundaries) of the material. (c) 2005 Elsevier SAS. All rights reserved.

引用

页码：912 / 919

页数：8

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