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Abstract
We report the magnetic, Mössbauer spectroscopy and resistivity measurements in order to understand the electronic behaviour of bulk Co 0.2Zn 0.8Fe 2O 4 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 Fe 2+ ions in the system, which implies that complete hopping of charge carriers between localized Fe 3+/Co 2+ and Fe 2+/Co 3+ pair of ions in B sublattice is not the favourable mechanism in Co 0.2Zn 0.8Fe 2O 4. We suggest that electrical behaviour of the present sample may be consistent with a model of fractional charge transfer via Fe B 3+-O 2−-Co B 2+ superexchange path.
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