BiCoOF-A Polar, Ferrimagnetic Aurivillius Oxide-Fluoride

Overview

Journal Chem Mater

Date 2022 Nov 18

PMID 36397835

Authors

Euan A S Scott

Eleni Mitoudi Vagourdi

Mats Johnsson

Vanessa Cascos

Filbin John

Dave Pickup

Alan V Chadwick

Hania Djani

Eric Bousquet

Weiguo Zhang

P Shiv Halasyamani

Emma E McCabe

Affiliations

Soon will be listed here.

Abstract

Aurivillius oxides have been a research focus due to their ferroelectric properties, but by replacing oxide ions by fluoride, divalent magnetic cations can be introduced, giving Bi OF ( = Fe, Co, and Ni). Our combined experimental and computational study on BiCoOF indicates a low-temperature polar structure of 2 symmetry (analogous to ferroelectric BiWO) and a ferrimagnetic ground state. These results highlight the potential of Aurivillius oxide-fluorides for multiferroic properties. Our research has also revealed some challenges associated with the reduced tendency for polar displacements in the more ionic fluoride-based systems.

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