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Epitaxially stabilized thin films of ɛ-Fe₂O₃ (001) grown on YSZ (100)

Lucas Corbellini, Christian Lacroix, Catalin Harnagea, Andreas Korinek, Gianluigi A. Botton, David Ménard and Alain Pignolet

Article (2017)

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Cite this document: Corbellini, L., Lacroix, C., Harnagea, C., Korinek, A., Botton, G. A., Ménard, D. & Pignolet, A. (2017). Epitaxially stabilized thin films of ɛ-Fe₂O₃ (001) grown on YSZ (100). Scientific Reports, 7. doi:10.1038/s41598-017-02742-9
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Abstract

Epsilon ferrite (epsilon-Fe2O3) is a metastable phase of iron(III) oxide, intermediate between maghemite and hematite. It has recently attracted interest because of its magnetocrystalline anisotropy, which distinguishes it from the other polymorphs, and results in a gigantic coercive field and a natural ferromagnetic resonance frequency in the THz range. Moreover, it possesses a polar crystal structure, making it a potential ferroelectric, hence a potential multiferroic. Due to the need of size confinement to stabilize the metastable phase, epsilon-Fe2O3 has been synthesized mainly as nanoparticles. However, to favor integration in devices, and take advantage of its unique functional properties, synthesis as epitaxial thin films is desirable. In this paper, we report the growth of epsilon-Fe2O3 as epitaxial thin films on (100)-oriented yttrium-stabilized zirconia substrates. Structural characterization outlined the formation of multiple in-plane twins, with two different epitaxial relations to the substrate. Transmission electron microscopy showed how such twins develop in a pillar-like structure from the interface to the surface. Magnetic characterization confirmed the high magnetocrystalline anisotropy of our film and revealed the presence of a secondary phase which was identified as the well-known magnetite. Finally, angular analysis of the magnetic properties revealed how the presence of twins impacts their azimuthal dependence.

Uncontrolled Keywords

information storage; magnetic properties and materials; structural properties

Open Access document in PolyPublie
Subjects: 3100 Physique > 3100 Physique
3100 Physique > 3101 Études atomiques et moléculaires
3100 Physique > 3104 Physique des particules
Department: Département de génie physique
Research Center: RQMP - Regroupement québécois sur les matériaux de pointe
Funders: CRSNG/NSERC, Fonds de recherche - Nature et Technologies
Date Deposited: 15 Jul 2021 12:36
Last Modified: 16 Jul 2021 01:20
PolyPublie URL: https://publications.polymtl.ca/4828/
Document issued by the official publisher
Journal Title: Scientific Reports (vol. 7)
Publisher: Springer Nature
Official URL: https://doi.org/10.1038/s41598-017-02742-9

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