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Title: Persistent conductive footprints of 109° domain walls in bismuth ferrite films

Using conductive and piezoforce microscopy, we reveal a complex picture of electronic transport at weakly conductive 109° domain walls in bismuth ferrite films. Even once initial ferroelectric stripe domains are changed/erased, persistent conductive paths signal the original domain wall position. The conduction at such domain wall “footprints” is activated by domain movement and decays rapidly with time, but can be re-activated by opposite polarity voltage. The observed phenomena represent true leakage conduction rather than merely displacement currents. We propose a scenario of hopping transport in combination with thermionic injection over interfacial barriers controlled by the ferroelectric polarization.
Authors:
; ; ;  [1] ; ; ;  [2] ; ;  [3]
  1. Ceramics Laboratory, EPFL-Swiss Federal Institute of Technology, Lausanne 1015 (Switzerland)
  2. DPMC-MaNEP, University of Geneva, 24 Quai Ernest Ansermet, 1211 Geneva 4 (Switzerland)
  3. Faculty of Science and Technology and MESA Institute for Nanotechnology, University of Twente, 7500 AE Enschede (Netherlands)
Publication Date:
OSTI Identifier:
22261641
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 13; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; BISMUTH; ELECTRIC CONDUCTIVITY; FERRITE; FERROELECTRIC MATERIALS; FILMS; THERMIONICS