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

Carcan, B. and Bouyanfif, H. and Marssi, M. E and Marrec, F. LE and Dupont, L and Davoisne, C and Wolfman, J and Arnold, D. C (2018) Interlayer strain effects on the structural behavior of BiFeO3/LaFeO3 superlattices. Journal of Applied Physics, 124 . ISSN 0021-8979. (doi:https://doi.org/10.1063/1.5037076) (Full text available)

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Abstract

Artificial (BiFeO3)0.5Λ /(LaFeO3)0.5Λ superlattices (SLs) have been grown by pulsed laser deposition. The periodicity Λ was varied from 150 Å to 25 Å and the relative ratio between BFO and LFO is kept constant in each period. X-ray diffraction, transmission electron microscopy (TEM) 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 2 of paraelectric-antiferroelectric phase transition scaling with BFO thickness. Strain and size effects explain this behavior and discussion is also made of the possible role of the oxygen octahedral rotation/tilt degree of freedom.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Sciences > School of Physical Sciences
Faculties > Sciences > School of Physical Sciences > Functional Materials Group
Depositing User: Donna Arnold
Date Deposited: 29 Aug 2018 09:17 UTC
Last Modified: 30 Aug 2018 12:21 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/68847 (The current URI for this page, for reference purposes)
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