4.5 Article

Effect of Zn2+ substitution on the magnetic properties of Mg1-xZnxFe2O4 ferrites

Journal

PHYSICA B-CONDENSED MATTER
Volume 404, Issue 21, Pages 3915-3921

Publisher

ELSEVIER
DOI: 10.1016/j.physb.2009.07.124

Keywords

Mg-Zn ferrites; Complex permeability; Spin canting

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Polycrystalline Mg1-xZnxFe2O4 (x = 0.0-0.6) ferrites have been prepared using solid-state reaction technique. The X-ray diffraction analysis revealed that the samples crystallize in a single-phase cubic spinel structure. The lattice parameter increases linearly with increase in zinc content obeying Vegard's law. The continuous decrease in Curie temperature (T-c) with an increase in Zn content is attributed to the weakening of A-B exchange interaction. Saturation magnetization (M-s) and magnetic moment are observed to increase up to x = 0.4, and thereafter decrease due to the spin canting in B-sites. The initial permeability is found to increase with the addition of Zn2+ ions but the resonance frequency shifts towards the lower frequency. (C) 2009 Elsevier B.V. All rights reserved.

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