A Multiferroic Ceramic with Perovskite Structure: La0.5Bi0.5Mn0.5Fe0.5O3.09

TL;DR

This study reports the synthesis of a novel multiferroic perovskite ceramic La0.5Bi0.5Mn0.5Fe0.5O3.09 exhibiting both ferromagnetic and ferroelectric properties at accessible conditions, with potential multifunctional applications.

Contribution

It introduces a new multiferroic ceramic with combined magnetic and electric properties synthesized under normal conditions, highlighting the role of specific cations in its behavior.

Findings

Ferromagnetic transition around 240 K with hysteresis

Reversible remnant polarization below 67 K

Magnetic interactions involve Fe3+-O-Mn3+ and Fe3+(Mn3+)-O-Fe3+(Mn3+) exchanges

Abstract

ABO3 perovskite multiferroic La0.5Bi0.5Mn0.5Fe0.5O3.09 where the B-site cations is responsible for the magnetic properties and the A-site cation with lone pair electron is responsible for the ferroelectric properties was synthesized at normal conditions. This oxide exhibits a ferromagnetic transition around 240 K with a well defined hysteresis loop, and a significant reversible remnant polarization below 67K similar to ferroelectric behavior. The magnetic interaction is interpreted by the ferromagnetic Fe3+-O-Mn3+ and antiferromagnetic Fe3+(Mn3+)-O-Fe3+(Mn3+) interactions competed each other, whereas the ferroelectricity is predominantly due to the polar nature introduced by the 6s2 lone pair of Bi3+ cations