Effect of doping of Co, Ni and Ga on magnetic and dielectric properties of layered perovskite multiferroic YBaCuFeO5

TL;DR

This study investigates how doping with Co, Ni, and Ga affects the magnetic and dielectric properties of the layered perovskite multiferroic YBaCuFeO5, revealing shifts in magnetic transition temperatures and dielectric relaxation mechanisms.

Contribution

It provides a detailed analysis of how magnetic and non-magnetic doping alters the structural, magnetic, and dielectric properties of YBaCuFeO5.

Findings

Ni and Co doping cause magnetic dilution and lower magnetic transition temperatures.

Ga doping shifts magnetic transition to lower temperatures.

Dielectric relaxation is due to charge carrier hopping.

Abstract

YBaCuFeO5 is one of the interesting multiferroic compounds, which exhibits magnetic ordering and dielectric anomaly above 200 K. Partial substitution of Fe with other magnetic and non-magnetic ion affects the magnetic and the structural properties of the system. We report detailed investigation of structural, magnetic and dielectric properties of YBaCuFe0.85M0.15O5 (M=Co, Ni and Ga). We observed that the partial replacement of Ni and Co in place of Fe, results in magnetic dilution and broadening of the magnetic transition and shifting towards lower temperature. The replacement of Fe with non-magnetic Ga also results in shifting of the magnetic transition to the lower temperature side. The observed dielectric relaxation behavior in these compounds is due to the charge carrier hoping. This study highlights the impacts of magnetic and non-magnetic doping at the magnetic site on magnetic and dielectric properties in layered perovskite compound YBaCuFeO5.