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Interlayer strain effects on the structural behavior of BiFeO3/LaFeO3 superlattices

Carcan, B., Bouyanfif, H., Marssi, M. E, Marrec, F. LE, Dupont, L, Davoisne, C, Wolfman, J, Arnold, Donna C. (2018) Interlayer strain effects on the structural behavior of BiFeO3/LaFeO3 superlattices. Journal of Applied Physics, 124 (4). Article Number 44105. ISSN 0021-8979. (doi:10.1063/1.5037076) (KAR id:68847)

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Artificial (BiFeO3)0.5Λ/(LaFeO3)0.5Λ superlattices have been grown by pulsed laser deposition. The periodicity Λ was varied from 150 Å to 25 Å and the relative ratio between BiFeO3 (BFO) and LaFeO3 (LFO) is kept constant in each period. X-ray diffraction, transmission electron microscopy, and Raman spectroscopy investigations indicate antiferroelectric-like structures for large periodicity (Λ ≥ 76 Å), while Pnma LaFeO3-like structures are observed for small periodicity Λ ≤ 50 Å. Room temperature magnetic measurements were obtained by vibrating sample magnetometry and suggest antiferromagnetic ordering with weak ferromagnetism. Temperature dependent x-ray diffraction studies show an important shift of paraelectric-antiferroelectric phase transition scaling with BFO thickness. Strain and size effects explain this behavior and discussion is also made on the possible role of the oxygen octahedral rotation/tilt degree of freedom.

Item Type: Article
DOI/Identification number: 10.1063/1.5037076
Subjects: Q Science
Divisions: Divisions > Division of Natural Sciences > School of Physical Sciences
Depositing User: Donna Arnold
Date Deposited: 29 Aug 2018 09:17 UTC
Last Modified: 16 Feb 2021 13:57 UTC
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