Ni_1-xMg_xFe₂O₄ (x = 0.2 to 0.8) nano particles are prepared by hydrothermal synthesis followed by microwave processing. Effect of microwave processing in reducing the required heat treatment are discussed. The samples are characterized by powder X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy, vibrating sample magnetometer and LCR bridge. Microwave processing has enhanced the chemical reaction to form ferrite without any stray ferric oxide phases. Microscopic images have confirmed that the particles still retain nano scale after microwave processing. An appreciably high magnetic moment is noticed. The experimental magnetic moment is used to estimate the cation distribution in tetrahedral and octahedral sites. Temperature and frequency dependence of initial permeability is discussed in the light of magnetic spin canting.

Madhuri Wuppulluri. She has accomplished her doctoral degree in Physics from Sri Krishnadevaya University of Anantapur, India, and is currently working as Assistant professor senior, at VIT, Vellore, India. As an active researcher in electro-ceramics she has guided many post graduate projects and students for their doctoral thesis. She has published around 50 peer reviewed international journals.She has a Scopus h-index of 8 and citation index 33. Within the last three years, she has successfully published more than 30 articles on Scopus Indexed journalsShe has also successfully completed one Defence Research and Development Orgaanisation, India, sponsored research project wherein she developed ceramic composites with high EMI absorption.