Journal
CHEMISTRY OF MATERIALS
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemmater.2c02745
Keywords
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Funding
- Royal Society (international exchange scheme) [RPG-2017-362]
- EU COST Action Towards oxide-based electronics
- Royal Society of Chemistry
- Welch Foundation [DMR-2002319]
- NSF [2014-3931]
- Swedish Research Council (VR)
- Leverhulme Trust [E-1457]
- [IES\R3\170112]
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By replacing oxide ions with fluoride, divalent magnetic cations can be introduced to Aurivillius oxides, showing potential for multiferroic properties. Challenges associated with reduced polar displacements in fluoride-based systems were revealed in our research.
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 Bi2MO2F4 (M = Fe, Co, and Ni). Our combined experimental and computational study on Bi2CoO2F4 indicates a low-temperature polar structure of P21ab 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.
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