Cation Distribution of Co-Ni-Mn Ferrites from Magnetization and Magnetostriction

Nickel doped CoMn ferrites with high magnetization were synthesized by double sintering solid state route with compositions of Co۰.۷-xNixMn۰.۳Fe۲O۴ with x = ۰, ۰.۰۵, ۰.۱ and ۰.۱۵. Theoretical Cation distribution for cubic spinel ferrites was suggested on basis of electrical configuration expectations and cation site preferences. Cation distribution suggested was in good agreement with experimental results obtained from VSM and XRD. Values of theoretically calculated magnetic moment, coercivity and magnetization are in good agreement with experimental data obtained from VSM. Maximum saturation magnetization of ۳۷.۷emu/gm is obtained for sample Co۰.۷Mn۰.۳Fe۲O۴ at magnetic field of ۵K Oe. Magnetostriction was found to increase with increasing magnetic field (from ۱KOe to ۵KOe.) Maximum magnetostriction of ۸۴ppm was observed for sample Co۰.۷Mn۰.۳Fe۲O۴ at ۵KOe. Maximum magnetization of magnetoelectric composites with ۳۰% Co۰.۷-xNixMn۰.۳Fe۲O۴ – ۷۰% PbZr۰.۴۸Ti۰.۵۲ was found to be ۷.۴ emu/g for composition with x = ۰.

Keywords:

Co-Ni-Mn Ferrites , Cation Distribution , Magnetostriction , Nickel doped , M-H Hysteresis loop.