Abstract
Polycrystalline Zn 0.6Cu 0.4Fe 2O 4 ferrites have been prepared using a solid-state reaction technique. Their structural and magnetic properties have been studied, using X-ray diffraction and Mössbauer and magnetic measurements. These results have been compared to a more general theoretical study, on Zn x Cu 1− x Fe 2O 4, based on mean field theory and high-temperature series expansions (HTSE), and extrapolated with the Padé approximant method. The nearest neighbour super-exchange interactions for the intra-site and the inter-site of Zn x Cu 1− x Fe 2O 4 spinel ferrites, in the range 0 ≤ x ≤ 1 , have been computed using the probability approach, based on Mössbauer data. The Curie temperature T C is calculated as a function of Zn concentration. The theoretical results obtained are in good agreement with the experimental results obtained by magnetic measurements.
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