Synthesis, structural and magnetic characterisation of the double perovskite A2MnMoO6 (A = Ba, Sr)

被引：75

作者：

Azad, A ^{[1
]}

Eriksson, SG

Ivanov, SA

Mathieu, R

Svedlindh, P

Eriksen, J

Rundlöf, H

机构：

[1] Uppsala Univ, Studsvik Neutron Res Lab, SE-61182 Nykoping, Sweden

[2] Univ Gothenburg, Dept Inorgan Chem, SE-41296 Gothenburg, Sweden

[3] LY Karpov Phys Chem Res Inst, RU-103064 Moscow, Russia

[4] Uppsala Univ, Dept Mat Sci, SE-75121 Uppsala, Sweden

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2004年 / 364卷 / 1-2期

关键词：

transition metal compounds; oxide materials; crystal structure; magnetic measurements;

D O I：

10.1016/S0925-8388(03)00611-X

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：

A study of the crystallographic structure and magnetic properties of the double perovskites Ba2MnMoO6 and Sr2MnMoO6 in polycrystalline form has been carried out by means of neutron powder diffraction (NPD) and magnetization measurements. The Rietveld analysis of room temperature data shows that the Mn2+ and Mo6+ ions are B-site ordered, i.e. the structure is a NaCl-type ordered double perovskite. Ba2MnMoO6 crystallizes in the cubic space group Fm(3) over bar m (a = 8.1680(l)) and Sr2MnMoO6 crystallizes in the space group P4(2)/n (a = 7.9575(5), c = 7.9583(9)). Bond valence sum (BVS) calculation revealed that these compounds have the valency pair of {Mn2+(3d(5);t(2g)(3)e(g)(2)), Mo6+(4d(0))} The magnetic measurements suggest that these compounds transform to an antiferromagnetic state below 10 K. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：77 / 82

页数：6

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