Magnetic properties of Sn-substituted Ni-Zn ferrite:synthesized from nano-sized powders of NiO, ZnO, Fe2O3 and SnO2

TL;DR

This study investigates how Sn substitution affects the magnetic properties of Ni-Zn ferrite synthesized from nano powders, revealing changes in magnetization, permeability, and Curie temperature, with potential applications in broadband devices.

Contribution

It provides new insights into the effect of Sn substitution on the magnetic behavior and structural stability of Ni-Zn ferrite synthesized from nano powders.

Findings

Saturation magnetization decreases with increasing Sn content.

Curie temperature increases with Sn substitution.

Initial permeability remains fairly constant across frequencies.

Abstract

A series of Ni0.6-x/2Zn0.4-x/2SnxFe2O4 (x = 0.0, 0.05, 0.1, 0.15, 0.2 and 0.3) (NZSFO) ferrite composites have been synthesized from nano powders using standard solid state reaction technique. The spinel cubic structure of the investigated samples has been observed by the X-ray diffraction (XRD). The magnetic properties such as saturation magnetization (Ms), remanent magnetization (Mr), coercive field (Hc) and Bohr magneton (B) are calculated from the hysteresis loops. The value of Ms is found to decrease with increasing Sn content in the samples. This change has been successfully explained by the variation of A-B interaction strength due to Sn substitution in different sites. The compositional stability and quality of the prepared ferrite composites have also been endorsed by the fairly constant initial permeability (/) over a wide range of frequency region. The decreasing trend of / with increasing Sn content has been observed. Curie temperature (TC) has found to increase with the increase in Sn content. Wide spread frequency utility zone indicates that the NZSFO can be considered as a good candidate for use in broadband pulse transformer and wide band read-write heads for video recording. The abnormal behavior for x = 0.05 has been explained with existing theory.