The magnetoelectric perovskite Sr{sub 3}Fe{sub 2}TeO{sub 9}: An insight from magnetic measurements and neutron powder diffraction

Journal Article · Thu Apr 12 04:00:00 EDT 2007 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2006.07.016· OSTI ID:21000625

Ivanov, S A ^[1]; Nordblad, P ^[2]; Eriksson, S -G ^[3]; Tellgren, R ^[4]; Rundloef, H ^[4]

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

A study of the crystallographic and magnetic structures of the double perovskite Sr{sub 3}Fe{sub 2}TeO{sub 9} has been carried out on a polycrystalline sample using neutron powder diffraction (NPD) data between 10 and 650 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 = 5.5614(7) A and c = 7.867(1) A and has a partially ordered arrangement of Fe and Te at the B-sites. The compound undergoes an I4/m {sup {yields}} Fm-3m improper ferroelectric phase transition near 460 K. A low-temperature ferrimagnetic ordering (below T {sub N} = 260 K) has been followed from the magnetisation measurements and sequential NPD data analysis. In good agreement with magnetic measurements the ferrimagnetic structure with very weak magnetisation is defined by the propagation vector k = (0, 0, 0). In addition to the obtained experimental results on magnetic and electric properties some aspects of magnetoelectricity in this perovskite are also discussed and compared with those of another quaternary oxide Sr{sub 3}Fe{sub 2}B{sup 6+}O{sub 9}.

• OSTI ID: 21000625
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 4 Vol. 42; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

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