The magnetoelectric perovskite Sr2CoMoO6:: An insight from neutron powder diffraction

被引：35

作者：

Ivanov, SA

Eriksson, SG

Tellgren, R

Rundlöf, H

Tseggai, M

机构：

[1] LY Karpov Phys Chem Res Inst, Dept Inorgan Mat, Xray Lab, Moscow 105064, Russia

[2] Gothenburg Univ, Dept Inorgan Chem, S-41124 Gothenburg, Sweden

[3] Uppsala Univ, Angstrom Lab, Dept Chem Mat, Uppsala, Sweden

来源：

MATERIALS RESEARCH BULLETIN | 2005年 / 40卷 / 05期

基金：

俄罗斯基础研究基金会;

关键词：

ceramics; neutron scattering; crystal structure; magnetic structure;

D O I：

10.1016/j.materresbull.2005.01.012

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A study of the crystallographic and magnetic structure of the double perovskite Sr2CoMoO6 (SCMO) has been carried out on a polycrystalline sample using neutron powder diffraction (NPD) data between 10 and 700 K. An analysis of the NPD patterns at room temperature has shown that this compound crystallises in the tetragonal space group I4/m with a = 5.5616(1) angstrom and c = 7.9470(2) angstrom and has a 1:1 ordered arrangement of Co and Mo at the B-sites. This compound undergoes a I4/m -> Fm3m improper ferroelectric phase transition near 560 K. A low-temperature antiferromagnetic ordering (below T-N = 36 K) has been followed from sequential NPD data analysis. The antiferromagnetic structure is defined by the propagation vector k = (1/2, 0, 1/2). In addition to the obtained experimental results on magnetic and electric properties some aspects of magnetoelectricity in this perovskite are also discussed. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：840 / 849

页数：10

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