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Magnetic ordering and electrical resistivity in Co0.2Zn0.8Fe2O4 spinel oxide
R N BHOWMIK, R RANGANATHAN, B GHOSH, S KUMAR, S CHATTOPADHYAY
Published in ELSEVIER SCIENCE SA
2008
Volume: 456
   
Issue: 43467
Pages: 348 - 352
Abstract
We report the magnetic, Mössbauer spectroscopy and resistivity measurements in order to understand the electronic behaviour of bulk Co0.2Zn0.8Fe2O4 spinel oxide. The effect of magnetic order on electrical behaviour is observed from the resistivity measurements in the absence and presence of magnetic field. The analysis of Mössbauer spectra suggests the absence of Fe2+ ions in the system, which implies that complete hopping of charge carriers between localized Fe3+/Co2+ and Fe2+/Co3+ pair of ions in B sublattice is not the favourable mechanism in Co0.2Zn0.8Fe2O4. We suggest that electrical behaviour of the present sample may be consistent with a model of fractional charge transfer via FeB3+-O2--CoB2+ superexchange path. © 2007 Elsevier B.V. All rights reserved.
About the journal
JournalData powered by TypesetJournal of Alloys and Compounds
PublisherData powered by TypesetELSEVIER SCIENCE SA
ISSN0925-8388