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Cation ordering in NiFe2-xCrxO4-spinels studied by Mössbauer spectroscopy in external fields
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Solid Earth Geology.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics, Physics III.
2008 (English)In: Physica status solidi. B, Basic research, ISSN 0370-1972, E-ISSN 1521-3951, Vol. 245, no 8, 1635-1640 p.Article in journal (Refereed) Published
Abstract [en]

NiFe2-xCrxO4, 0 < ;= x < ;= 1.8, produced from appropriate oxides, has been studied using Mossbauer spectroscopy (MS) at low and ambient temperatures and in external fields up to 7 Tesla. X-ray diffraction (XRD) shows all samples to be single phase cubic spinels, where a(0) change in x, as a concave curve, with a minimum at around x=1. Analyses, based on Mossbauer spectra, show NiFe2-xCrxO4 to be a nearly perfect inverted spinel for x < ;= 0.6. However, for higher x-values the ordering is more complicated. It is shown that iron also populates the octahedral positions for x > ;= 0.8.

Place, publisher, year, edition, pages
2008. Vol. 245, no 8, 1635-1640 p.
Keyword [en]
61.05.cp • 76.80.+y
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-103313DOI: 10.1002/pssb.200743507ISI: 000258414500025OAI: oai:DiVA.org:uu-103313DiVA: diva2:218033
Available from: 2009-05-18 Created: 2009-05-18 Last updated: 2017-12-13Bibliographically approved

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