Magnetic and Mössbauer Studies of Mn $_{0.679{-}{\rm x}}$ Zn $_{0.256}$ Ti

MnZn ferrites substituted with titanium having the compositional formula of Mn_0.679-xZn_0.258Ti_xFe_2.066O₄ (x = 0, 0.010, 0.020, 0.030) were prepared via a conventional ceramic process. The effect of titanium concentration on magnetic properties such as permeability, power loss, and Curie temperature were investigated. Moreover, Mössbauer spectra was recorded at room temperature. The cation distribution obtained from analysis of Mössbauer spectra revealed that the substitution of MnZn ferrites by titanium can move part of Fe³⁺ from octahedral (B) site to tetrahedral (A) site. Remarkably, this resulted in an increase in the amount of Fe²⁺_A-Fe³⁺_B ion pairs and the Curie temperature. The results obtained and mechanisms involved are discussed.