Mossbauer measurements have been made on the system Fe3−xTixO4 for 1·0 ≥x ≥ 0. This system is interesting in that it is expected to form a continuous solid solution over the whole range and also occurs naturally. Spectra taken at various temperatures between 300 K and 77 K show complex behaviour. The results can be understood in terms of disorder and consequent formation of superparamagnetic clusters which are supported by our earlier hysteresis and susceptibility studies at various temperatures. It appears that with increasing Ti content domain wall formation is inhibited resulting in effectively monodomain clusters. Considering the work reported by others, we suggest that Mossbauer spectra of multidomain material should show well-resolved magnetic hyperfine spectrum, even close to itsTN.
Volume 42 | Issue 6
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