Influence of Mo6+ on magnetic and micro-structural properties of copper ferrite

Two series of copper ferrites are prepared using the chemical compositional formula Cu (1.0) Fe (2.0-2x) Mo (x) O-4.0 and Cu (1.0-3x) Fe (2.0) Mo (x) O-4.0. They are calcinated at 750 C and sintered at 950C. The grain size initially decreases with Mo6+ concentration. while it found to increase from x = y = 0.06 (Mo6+) onwards. The monotonic increase of Tc is found in C series materials while in F series it observed to decrease at intermediate values of x. Variation of magnetization has been explained on the basis of Neel's model of magnetic interactions and Yafet-Kittel angle existence. The initial permeability (mu(i)) increases at room temperature followed by its fall with the increase of F as well as C series. The observed deviation between experimental and theoretical magnetic moment values is explained in terms of Y-K angle occurrence. (C) 2017 Elsevier B. V. All rights reserved.