Estimation Of Magnetic Interactions In Substituted Mg-Mn Ferrites Synthesized Via Citrate Precursor Technique

¹Department of Physics, Himachal Pradesh University, Shimla 171005, India

²CSIR-National Physical Laboratory, Dr. K. S. Krishnan Road, New Delhi 110012, India

³Department of Physics, Pohang University of Science and Technology, Pohang 790784, Republic of Korea

Adv. Mater. Lett., 2015, 6 (9), pp 828-833

DOI: 10.5185/amlett.2015.5958

Publication Date (Web): Sep 06, 2015

Copyright © IAAM-VBRI Press

E-mail:bhargava_phy_hpu@yahoo.co.in

Abstract

We investigated the effects of In³⁺ and Co²⁺ substitutions on the structural and magnetic properties of Mg-Mn ferrites. The cation distribution technique was taken into account to estimate the magnetic interactions. Cation distribution was also used to investigate the ionic radii of tetrahedral and octahedral sites, oxygen positional parameter, site bond as well as edge lengths, bond lengths and bond angles. The ionic radius of tetrahedral site and octahedral site was observed to increase with the incorporation of In³⁺ and Co²⁺ ions respectively. Theoretical lattice parameter was observed to increase with the substitution of In³⁺ and Co²⁺ ions. In³⁺ substitution resulted in weakening of super-exchange interactions while in Co²⁺ substituted Mg-Mn ferrites, anisotropy was observed to play a decisive role in addition to bond lengths and bond angles.

Keywords

Ferrites, cation distribution, oxygen parameter, bond lengths, bond angles.