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.
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收藏
页码：416 / 423
页数：8
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