Mossbauer study of ferrite systems Co x Mn1−x Fe2O4 and Ni x Mn1−x Fe2O4 |
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| Authors: | V K Singh N K Khatri S Lokanathan |
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| Affiliation: | (1) Department of Physics, University of Rajasthan, 302 004 Jaipur, India;(2) Present address: SGRR (PG) College, Dehra Dun |
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| Abstract: | Mössbauer spectra of Co x Mn1?x Fe2O4 and Ni x Mn1?x Fe2O4 ferrites withx values ranging from 0·1 to 0·8 in steps of 0·1 have been recorded at room temperature. All spectra exhibit well-defined Zeeman hyperfine patterns. It has been observed that hyperfine field at Fe3+ nucleus increases more rapidly by nickel substitution than by cobalt substitution. This has been explained in terms of exchange interactions and cation distribution in the spinels. Hyperfine fields, isomer shifts and quadrupole splittings have been determined. |
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| Keywords: | Ferrites M?ssbauer spectra octahedral sites tetrahedral sites superexchange interaction hyperfine field isomer shift quadrupole splitting site preference energy |
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