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

Journal Article · Wed May 18 04:00:00 EDT 2005 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2005.01.012· OSTI ID:20889773

Ivanov, S A ^[1]; Eriksson, S -G ^[2]; Tellgren, R ^[3]; Rundloef, H ^[3]; Tseggai, M ^[3]

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1. Department of Inorganic Materials, X-ray laboratory, Karpov' Institute of Physical Chemistry, Ul.Vorontsovo pole 10, 105064 Moscow K-64 (Russian Federation)
2. Department of Inorganic Chemistry, University of Gothenburg (Sweden)
3. Department of Materials Chemistry, The Angstrom Laboratory, University of Uppsala, Uppsala (Sweden)

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.

• OSTI ID: 20889773
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 5 Vol. 40; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANTIFERROMAGNETISM
CERAMICS
CRYSTALLOGRAPHY
DATA ANALYSIS
ELECTRICAL PROPERTIES
FCC LATTICES
FERROELECTRIC MATERIALS
MAGNETIC FIELDS
NEUTRON DIFFRACTION
PEROVSKITE
PHASE TRANSFORMATIONS
POLYCRYSTALS
SPACE GROUPS
TEMPERATURE DEPENDENCE
TETRAGONAL LATTICES