Cationic distribution assisted tuning of magnetic properties of Li0.5-x/2ZnxFe2.5-x/2O4

S Panchal,K Gehlot,S Raghuvanshi,F Mazaleyrat,S N Kane

doi:10.1063/1.4944517

Abstract

Zn addition induced modification of cationic distribution for tuning magnetic properties of Li0.5-x/2ZnxFe2.5-x/2O4 (x = 0, 0.1, 0.25, 0.3, 0.5, 0.7, 0.9, 1.0) powders is studied by x-ray diffraction (XRD) and, magnetic measurements. XRD shows the formation of cubic spinel structure, with Scherrer’s grain diameter ranging between 26.7 to 37.8 nm. With Zn addition, oxygen anions are displaced in such a way that the A-B interaction weakens, whereas A-A and B-B interaction strengthens; furthermore it also pushes Fe3+ and Li1+ ions to B site, leading to changes in magnetic properties. Highest saturation magnetization (Ms) of 64.6 A m2 / kg was obtained for sample with x = 0.25 and lowest coercivity (Hc) of 4949.9 A/m was obtained for the sample with x = 0.7. Calculated values of experimental magnetic moment ‘nB’ and Neel magnetic moment ‘nN’, display similar trend as that of Ms. Present results very clearly show a strong correlation between Zn-addition induced changes in cation distribution and magnetic properties, which can be utilized effectively for tuning magnetic properties.

Highlights

Zn addition induced modification of cationic distribution for tuning magnetic properties of Li0.5-x/2ZnxFe2.5-x/2O4 (x = 0, 0.1, 0.25, 0.3, 0.5, 0.7, 0.9, 1.0) powders is studied by x-ray diffraction (XRD) and, magnetic measurements
Spinel ferrites are a large class of oxides with remarkable magnetic properties, encompasses an impressive range extending from millimeter wave integrated circuitry to power handling, simple permanent magnets and, magnetic recording
The lattice consists of 32 divalent oxygen ions which are in direct contact to one another forming a closed pack face centered cubic arrangement with 64 tetrahedral interstitial sites (A sites) and 32 octahedral interstitial sites (B sites)

Summary

Introduction

Spinel ferrites are a large class of oxides with remarkable magnetic properties, encompasses an impressive range extending from millimeter wave integrated circuitry to power handling, simple permanent magnets and, magnetic recording. Zn addition induced modification of cationic distribution for tuning magnetic properties of Li0.5-x/2ZnxFe2.5-x/2O4 (x = 0, 0.1, 0.25, 0.3, 0.5, 0.7, 0.9, 1.0) powders is studied by x-ray diffraction (XRD) and, magnetic measurements.

Results

Conclusion