The magnetoelectric perovskite Sr{sub 2}CoMoO{sub 6}: An insight from neutron powder diffraction

A study of the crystallographic and magnetic structure of the double perovskite Sr{sub 2}CoMoO{sub 6} (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 comp...

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Bibliographic Details
Published inMaterials research bulletin Vol. 40; no. 5
Main Authors Ivanov, S.A., Eriksson, S.-G., Tellgren, R., Rundloef, H., Tseggai, M.
Format Journal Article
LanguageEnglish
Published United States 18.05.2005
Subjects
ANTIFERROMAGNETISM
CERAMICS
CRYSTALLOGRAPHY
DATA ANALYSIS
ELECTRICAL PROPERTIES
FCC LATTICES
FERROELECTRIC MATERIALS
MAGNETIC FIELDS
MATERIALS SCIENCE
NEUTRON DIFFRACTION
PEROVSKITE
PHASE TRANSFORMATIONS
POLYCRYSTALS
SPACE GROUPS
TEMPERATURE DEPENDENCE
TETRAGONAL LATTICES
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Summary:A study of the crystallographic and magnetic structure of the double perovskite Sr{sub 2}CoMoO{sub 6} (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) A and c 7.9470(2) A and has a 1:1 ordered arrangement of Co and Mo at the B-sites. This compound undergoes a I4/m {yields} Fm3m improper ferroelectric phase transition near 560 K. A low-temperature antiferromagnetic ordering (below T {sub 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.
ISSN:0025-5408
1873-4227
DOI:10.1016/j.materresbull.2005.01.012