Abstract

Mixed ferrites Cr1.05 Li0.5 Mg x Fe1.45-(2/3)x O4 (0 ≤ x ≤ 0.4) doped with Magnesium have been studied using x-ray diffraction, Mossbauer spectroscopy and magnetic measurements. X-ray diffraction patterns show that all samples have single phase cubic spinel structure. The temperature-dependent magnetic measurements revealed that magnetic compensation disappears when Fe3+ in A-site is partially replaced by Mg2+. Moreover, below the compensation temperature the observed magnetic moment of these ferrites increases with magnesium content. The magnetization data at all concentrations are discussed in the light of Neel’s molecular field model taking into account the cations distribution obtained using the analysis of Mossbauer spectra.

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