Affiliation:
1. Science and Technology University of Inner Mongolia
2. University of Science and Technology Inner Mongolia
Abstract
The effects of Fe3+substitutions by Sm3+on microstructure and magnetic properties of Ni0.4Zn0.6Fe2-xSmxO4ferrites prepared by conventional solid-state reaction method were investigated. With increasing Sm3+content, the lattice parameter ɑ and sintered density of sintered samples increase, while the real part of permeability and magnetic loss tangent decrease. Samples carried out at 1250°C for 4h resulted in materials with cubic spinel phase, but a small amount of SmFeO3was also formed. Magnetic properties results showed that the super-exchange interaction between octahedral B sites and tetrahedral A sites was badly impaired and the net overall magnetic moment (m=mB-mA) has an obvious decrease. It was also found that in these compounds Fe-Fe interaction dominates, the Sm-Fe interaction (3d-4f coupling) having a minor effect.
Publisher
Trans Tech Publications, Ltd.