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The magnetoelectric perovskite Sr3Fe2TeO9: An insight from magnetic measurements and neutron powder diffraction
Department of Inorganic Materials, Karpov’ Institute of Physical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Department of Inorganic Chemistry, University of Gothenburg.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry.
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2007 (English)In: Materials research bulletin, ISSN 0025-5408, E-ISSN 1873-4227, Vol. 42, no 4, 776-789 p.Article in journal (Refereed) Published
Abstract [en]

A study of the crystallographic and magnetic structures of the double perovskite Sr3Fe2TeO9 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) Å and c = 7.867(1) Å and has a partially ordered arrangement of Fe and Te at the B-sites. The compound undergoes an I4/m → Fm-3m improper ferroelectric phase transition near 460 K. A low-temperature ferrimagnetic ordering (below TN = 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 Sr3Fe2B6+O9.

Place, publisher, year, edition, pages
2007. Vol. 42, no 4, 776-789 p.
Keyword [en]
Ceramics, Neutron scattering, Crystal structure, Magnetic structure
National Category
Chemical Sciences Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-11670DOI: 10.1016/j.materresbull.2006.07.016ISI: 000245321400022OAI: oai:DiVA.org:uu-11670DiVA: diva2:39439
Available from: 2008-01-31 Created: 2008-01-31 Last updated: 2017-12-11Bibliographically approved

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Nordblad, PerTellgren, RolandRundlöf, Håkan

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