Tunable exchange bias effect in magnetic Bi$_{0.9}$Gd$_{0.1}$Fe$_{0.9}$Ti$_{0.1}$O$_3$ nanoparticles at temperatures up to 250 K

TL;DR

This study demonstrates a tunable exchange bias effect in Gd and Ti co-doped BiFeO3 nanoparticles, which varies with magnetic field cooling and temperature, up to 250 K, indicating potential for magnetic device applications.

Contribution

It reports the observation of a tunable exchange bias effect in BiFeO3 nanoparticles doped with Gd and Ti, influenced by cooling magnetic field and temperature, up to 250 K.

Findings

Exchange bias field increases with magnetic field cooling.

Exchange bias effect is temperature-dependent.

Tunable exchange bias observed up to 250 K.

Abstract

The exchange bias (EB) effect has been observed in magnetic Bi$_{0.9}$Gd$_{0.1}$Fe$_{0.9}$Ti$_{0.1}$O$_3$ nanoparticles. The influence of magnetic field cooling on the exchange bias effect has also been investigated. The magnitude of the exchange bias field ($H_{EB}$) increases with the cooling magnetic field, showing that the strength of the exchange bias effect is tunable by the field cooling. The $H_{EB}$ values are also found to be dependent on the temperature. This magnetically tunable exchange bias obtained at temperatures up to 250 K in Bi$_{0.9}$Gd$_{0.1}$Fe$_{0.9}$Ti$_{0.1}$O$_3$ nanoparticles may be worthwhile for potential applications.