Initial susceptibility studies on Cu-Mg-Zn ferrites

• Published in: Materials chemistry and physics 1999-04, Vol.59 (1), p.57-62
• Main Authors: Bhosale, D.N, Verenkar, V.M.S, Rane, K.S, Bakare, P.P, Sawant, S.R
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Cu-Mg-Zn ferrites; Exact sciences and technology; Ferrimagnetics; Initial susceptibility; Magnetic properties and materials; Multidomain; Physics; Single domain; Studies of specific magnetic materials; Synthesis of ferrites
• ISSN: 0254-0584; 1879-3312
• DOI: 10.1016/S0254-0584(99)00028-0

Cu (0.5− x) Mg x Zn 0.5 Fe 2O 4 ferrites were synthesised by thermal decomposition of oxalate complexes by co-precipitation technique using oxalate precursors. X-ray diffraction studies revealed a single spinel phase with un-detectable impurity phases. Lattice parameter showed a decreasing trend with increasing Mg 2+ content, which is attributed to the ionic sizes of Mg 2+ and Cu 2+ ions. The temperature variation of susceptibility for oxalate complex decomposed at 600°C did not exhibit peak in χ ac → T variation. Ferrites with x < 0.4 sintered at 950°C showed small peak in χ ac → T near T c. However χ ac → T variation for the ferrites sintered at 1000°C exhibited MD type grains in predominance. The domain wall width increases with the addition of Mg 2+ content. Particle size distribution (PSD) indicated absence of fine particles predominantly. Therefore double T c behaviour is not exhibited by the samples. Initial permeability and initial susceptibility increase with increase in Mg 2+ content.