Bi₂CoO₂F₄-A Polar, Ferrimagnetic Aurivillius Oxide-Fluoride.

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 Bi₂ MO₂F₄ (M = Fe, Co, and Ni). Our combined experimental and computational study on Bi₂CoO₂F₄ indicates a low-temperature polar structure of P2₁ ab symmetry (analogous to ferroelectric Bi₂WO₆) 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.

SUBMITTER: Scott EAS 

PROVIDER: S-EPMC9648175 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature