Effect of dilution of both A- and B- sites on the multiferroic properties of spinal Mott insulators

TL;DR

This study investigates how doping A- and B-sites in FeV2O4 affects its multiferroic properties, revealing that Li and Cr doping modify magnetic and ferroelectric transition temperatures through changes in A-V coupling.

Contribution

It provides new insights into how site-specific doping influences the multiferroic behavior of FeV2O4, highlighting the role of A-V coupling in property modulation.

Findings

Li doping increases ferri-magnetic ordering temperature

Cr doping raises ferri-magnetic temperature without affecting ferroelectric transition

Doping alters A-V distances and coupling, impacting multiferroic properties

Abstract

The structural, magnetic, electrical and transport properties of FeV2O4, by doping Li and Cr ions respectively in A and B sites, have been studied. Dilution of A-site by Li doping increases the ferri-magnetic ordering temperature and decreases the ferroelectric transition temperature. This also decreases the V-V distances which in effect increases the A-V coupling. This increased A-V coupling dominates over the decrease in A-V coupling due to doping of non-magnetic Li. On the other hand, Cr doping increases the ferri-magnetic ordering temperature but does not alter the ferroelectric transition temperature which is due to the fact that the polarization origin to the presence of almost non-substituted regions.