Bulletin of the American Physical Society
APS March Meeting 2020
Volume 65, Number 1
Monday–Friday, March 2–6, 2020; Denver, Colorado
Session R64: Chiral and Polar Structures in Thin Film Oxides
8:00 AM–11:00 AM,
Thursday, March 5, 2020
Room: Mile High Ballroom 4E
Sponsoring
Units:
DMP DCOMP
Chair: Kaveh Ahadi, NC State University
Abstract: R64.00009 : Surface Proximity Effect, Imprint Memory of Ferroelectric Twins, and Tweed in the Paraelectric Phase of BaTiO3*
Presenter:
Nicholas Barrett
(SPEC, CEA, CNRS, Université Paris-Saclay)
Authors:
Nicholas Barrett
(SPEC, CEA, CNRS, Université Paris-Saclay)
Claire Mathieu
(SPEC, CEA, CNRS, Université Paris-Saclay)
Christophe Lubin
(SPEC, CEA, CNRS, Université Paris-Saclay)
Pascale Gemeiner
(SPMS, Centrale Supélec, Université Paris Saclay)
Brahim Dkhil
(SPMS, Centrale Supélec, Université Paris Saclay)
Ekhard Salje
(Department of Earth Sciences, University of Cambridge)
We present a PEEM study of the evolution of the domain structure in BaTiO3(001) through the phase transition. At room temperature, in- and out-of-plane polarized domains are present with ferroelectric and ferroelastic domain walls. Adsorbate screening results in inversion of the electrostatic surface potential contrast. Domain-related structure above the Curie temperature (TC) is observable. Ferroelectric memory persist up to 550 K. The domain-like structures above TC may be related to a combination of atomic relaxation, adsorbates and oxygen vacancies. Finally, we present some first results of PEEM imaging of domain wall creep at the surface of BaTiO3 around TC.
*Conseil Régional Île de France SESAME project MesoXcopy
ERSRC (EP/PO24904/1) and the Levershulme trust (RP6-2012-564)
ANR Investissements d’Avenir program (Labex NanoSaclay ANR-10-LABX-0035 and ANR11-EQPX0005-ATTOLAB)
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