Phase Diagram of BiFeO 3 /LaFeO 3 Superlattices: Antiferroelectric-Like State Stability Arising from Strain Effects and Symmetry Mismatch at Heterointerfaces

Benjamin Carcan; Houssny Bouyanfif; Mimoun El Marssi; Françoise Le Marrec; Loic Dupont; Carine Davoisne; Jérôme Wolfman; Donna Arnold

Phase Diagram of BiFeO 3 /LaFeO 3 Superlattices: Antiferroelectric-Like State Stability Arising from Strain Effects and Symmetry Mismatch at Heterointerfaces

Benjamin Carcan Houssny Bouyanfif Mimoun El Marssi ¹ Françoise Le Marrec Loic Dupont Carine Davoisne ² Jérôme Wolfman ³ Donna Arnold

1 EA 2081 - Laboratoire de Physique de la Matière Condensée

2 LRCS - Laboratoire réactivité et chimie des solides

3 GREMAN - UMR 7347 - GREMAN (matériaux, microélectronique, acoustique et nanotechnologies)

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.

Document type :

Journal articles

Domain :

Physics [physics] / Condensed Matter [cond-mat] / Materials Science [cond-mat.mtrl-sci]

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https://hal-univ-tours.archives-ouvertes.fr/hal-01867383
Contributor : Jerome Wolfman <>
Submitted on : Monday, September 10, 2018 - 3:54:13 PM
Last modification on : Monday, July 8, 2019 - 11:38:09 AM
Long-term archiving on : Tuesday, December 11, 2018 - 3:49:56 PM

Revised Manuscript # JAP18-AR-...

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Phase Diagram of BiFeO 3 /LaFeO 3 Superlattices: Antiferroelectric-Like State Stability Arising from Strain Effects and Symmetry Mismatch at Heterointerfaces

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Phase Diagram of BiFeO 3 /LaFeO 3 Superlattices: Antiferroelectric-Like State Stability Arising from Strain Effects and Symmetry Mismatch at Heterointerfaces

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