Magnetic field induced ferroelectric loop in Bi0.75Sr0.25FeO3

TL;DR

This study reports a magnetic field-induced ferroelectric hysteresis loop in Bi0.75Sr0.25FeO3, highlighting its significant magnetoelastic and magnetoelectric properties with potential for technological applications.

Contribution

It demonstrates the existence of a magnetic field-induced ferroelectric loop in Bi0.75Sr0.25FeO3, with high polarization and low coercive field, revealing novel magnetoferroelectric behavior.

Findings

High polarization (Pr=96 μC/cm² at 10T)

Low coercive field (Hc=661 V/cm at 10T)

Structural transition under magnetic field

Abstract

Magnetic field induced ferroelectric hysteresis loop observed in Bi0.75Sr0.25FeO3-delta is of prime importance. The coexistence of antiferromagnetism and weak ferromagnetism is responsible for the original magnetoelastic and magnetoferroelectric properties. Upon external magnetic field application, the existence of a magnetostrictive effect supports a structural transition towards a homogeneous antiferromagnetic and ferroelectric phase. The magnetic field induced polarization is among the highest reported for BiFeO3 based systems in either thin film or bulk forms (Pr=96 microC/cm2 at 10T) while the ferroelectric coercive field is among the lowest reported (Hc=661(V/cm) at 10T). These properties make this material very attractive for technical applications.