Influence of successive sintering treatments on high ordered Sr2FeMoO6 double perovskite properties

被引：25

作者：

Jurca, B. ^{[1
,2
]}

Berthon, J. ^{[1
]}

Dragoe, N. ^{[1
]}

Berthet, P. ^{[1
]}

机构：

[1] Univ Paris 11, Inst Chim Mol & Mat Orsay, F-91405 Orsay, France

[2] Univ Bucharest, Dept Phys Chem, Bucharest 030018, Romania

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2009年 / 474卷 / 1-2期

关键词：

Oxide materials; Solid-state reactions; Magnetoresistance; Magnetic measurements; X-ray diffraction; LOW-FIELD MAGNETORESISTANCE; NANOMETER-SCALE PARTICLES; MAGNETIC-PROPERTIES; MAGNETOTRANSPORT PROPERTIES; FERROMAGNETIC-RESONANCE; ROOM-TEMPERATURE; THIN-FILMS; OXIDES; POLYCRYSTALS; SUSCEPTIBILITY;

D O I：

10.1016/j.jallcom.2008.06.100

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The influence of successive sintering treatments on the structural, magnetic and electric properties of high ordered Sr2FeMoO6 (SFMO) samples belonging to the same starting batch was investigated. The solid-state synthesis conditions influence the microstructure of the samples and the Fe/Mo order. Successive sintering treatments with intermediate grindings improve the saturation magnetization (3.8 mu(B)) which became close to the ideal value (4 mu(B)) and the low field magnetoresistance (LFMR) as a consequence of microstructural changes. Above the Curie temperature the evolution of effective magnetic moment values depicts the presence of mixed valency states: Fe-II/Mo-VI and Fe-III/Mo-V where the contribution of Fe-II/Mo-VI configuration is favoured by the enhancement of Fe/Mo order during successive sintering treatments. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：416 / 423

页数：8

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