Structural, magnetic and transport properties of Sr2Fe1-xCrxMoO6-y

被引：59

作者：

Blasco, J ^{[1
]}

Ritter, C

Morellon, L

Algarabel, PA

De Teresa, JM

Serrate, D

García, J

Ibarra, MR

机构：

[1] Univ Zaragoza, Dept Fis Mat Condensada, E-50009 Zaragoza, Spain

[2] Univ Zaragoza, Inst Ciencia Mat Aragon, E-50009 Zaragoza, Spain

[3] CSIC, E-50009 Zaragoza, Spain

[4] Inst Max Von Laue Paul Langevin, F-38042 Grenoble 9, France

来源：

SOLID STATE SCIENCES | 2002年 / 4卷 / 05期

关键词：

double perovskites; half-metal; magnetoresistance; rietveld analysis; neutron diffraction; ferrimagnetism;

D O I：

10.1016/S1293-2558(02)01309-2

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The series of Sr2Fe1-xCrxMoO6-y has been synthesized and studied by means of a wide set of experimental techniques. These samples belong to the family of A(2)BB'O-6 double perovskites with a ferrimagnetic ground state. The replacement of Fe by Cr leads to samples with a high oxygen deficiency and to increasing cation disorder between B and B' sites. The magnetic moments of these samples decrease as the iron content does. Electrical properties chance as well strongly along the series: while Sr2FeMoO6 is metallic, the rest of the samples show a semiconducting behavior with an activation energy that increases as the content of Cr does. Only Fe-rich samples exhibit large negative magnetoresistance with the low-field response characteristic of a half-metallic system. The Cr-rich samples display instead a small linear negative magnetoresistance. (C) 2002 Editions scientifiques et medicales Elsevier SAS. All rights reserved.

引用

页码：651 / 660

页数：10

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