Local structure surrounding V sites in Co doped ZnV2O4

TL;DR

This study investigates the local structural and magnetic effects of Co doping in ZnV2O4 using synchrotron X-ray diffraction, magnetization, and EXAFS, revealing changes in bond lengths, lattice parameters, and the high-spin state of Co ions.

Contribution

It provides new insights into the local structural environment and electronic state of Co in ZnV2O4, advancing understanding of doping effects in vanadate spinels.

Findings

Co doping shifts the system towards itinerant electron behavior.

Bond lengths and lattice parameters change near the magnetic transition.

Co ions are in the high-spin state in the doped material.

Abstract

Co doped ZnV2O4 has been investigated by Synchrotron X-ray diffraction, Magnetization measurement and Extended X-ray absorption fine structure (EXAFS) analysis. With Co doping in the Zn site the system moves towards the itinerant electron limit. From Synchrotron and magnetization measurement it is observed that there is an effect in bond lengths and lattice parameters around the magnetic transition temperature. The EXAFS study indicates that Co ion exists in the High spin state in Co doped ZnV2O4.