Multiferroic BiFeO3-BiMnO3 Nanocheckerboard From First Principles

TL;DR

This study uses first principles calculations to explore a novel atomic-scale checkerboard heterostructure of BiFeO3 and BiMnO3, revealing a multiferroic ground state with unique magnetostructural effects not seen in bulk or layered forms.

Contribution

It introduces and analyzes a new nanocheckerboard heterostructure of BiFeO3-BiMnO3, demonstrating its multiferroic properties and novel magnetostructural phenomena through first principles methods.

Findings

The nanocheckerboard has a multiferroic ground state combining properties of both materials.

Cation ordering influences magnetic ordering in the heterostructure.

A new magnetostructural effect arises from the checkerboard geometry.

Abstract

We present a first principles study of an unusual heterostructure, an atomic-scale checkerboard of BiFeO3-BiMnO3, and compare its properties to the two bulk constituent materials, BiFeO3 and BiMnO3. The "nanocheckerboard" is found to have a multiferroic ground state with the desired properties of each constituent: polar and ferrimagnetic due to BiFeO3 and BiMnO3, respectively. The effect of B-site cation ordering on magnetic ordering in the BiFeO3-BiMnO3 system is studied. The checkerboard geometry is seen to give rise to a a novel magnetostructural effect that is neither present in the bulk constituent materials, nor in the layered BiFeO3-BiMnO3 superlattice.