Preparation and magnetic properties of Ir-Co and La-Zn substituted barium ferrite powders obtained by sol-gel

The room temperature magnetic properties and microstructural characteristics of Ir-Co and La-Zn substituted Ba-ferrites powders prepared for the sol-gel method were investigated. Saturation magnetisation increased with La-Zn substitution in contrast to Ir-Co substitution. La-Zn mixtures were the least effective in reducing coercivity, whilst Ir-Co led to a fast reduction at low levels of substitution. (C) 2002 Elsevier Science B.V. All rights reserved.