Impedance spectroscopy, dielectric and magnetic study of M-type Strontium hexaferrite and its modified systems by Cobalt (Co) and Titanium (Ti)

TL;DR

This study investigates the structural, dielectric, magnetic, and conduction properties of M-type strontium hexaferrite and its Co and Ti modified systems, revealing effects of modifications on magnetic coercivity and dielectric relaxation.

Contribution

It presents the successful synthesis and comprehensive analysis of Co and Ti modified strontium hexaferrite, highlighting their impact on magnetic and dielectric properties.

Findings

Co modification reduces coercive field significantly

Grain and electrode effects influence dielectric relaxation

Single-phase formation confirmed by XRD and SEM

Abstract

Polycrystalline M-type hexagonal Strontium hexaferrite and its modified systems by Cobalt (Co) and Titanium (Ti) were successfully prepared by the solid state reaction method. The single phase formation of all the systems and well grain growth of micrometer range was confirmed by X-ray diffraction pattern and Scanning Electron Microscopic image respectively. The impedance spectroscopy and dielectric properties were investigated in a selected frequency & temperature range. The room temperature M-H loop study for Strontium hexaferrite and Cobalt modified Strontium hexaferrite was carried out by Vibrate Sample Magnetometer. From the investigation it was found that, the grain, grain boundary and electrode polarization have significant effect on dielectric relaxation and conduction mechanism for all the systems. From M-H loop study it was found that Co modified system has drastic reduction of coercive field.