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Title: Two-step polarization reversal in biased ferroelectrics

Polarization reversal in polycrystalline ferroelectrics is shown to occur via two distinct and sequential domain reorientation steps. This reorientation sequence, which cannot be readily discriminated in the overall sample polarization, is made apparent using time-resolved high-energy x-ray diffraction. Upon application of electric fields opposite to the initial poling direction, two unique and significantly different time constants are observed. The first (faster time constant) is shown to be derived by the release of a residual stress due to initial electrical biasing and the second (slower time constant) due to the redevelopment of residual stress during further domain wall motion. A modified domain reorientation model is given that accurately describes the domain volume fraction evolution during the reversal process.
Authors:
; ;  [1] ;  [1] ;  [2] ; ;  [3] ;  [4] ;  [5] ;  [6] ;  [3] ;  [2]
  1. School of Materials Science and Engineering, University of New South Wales, Sydney 2052 (Australia)
  2. (United States)
  3. Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611 (United States)
  4. Université Claude Bernard Lyon 1, LMI -UMR CNRS n°5615, 69622 Villeurbanne Cedex (France)
  5. (France)
  6. School of Mechanical and Advanced Materials Engineering, UNIST, Ulsan (Korea, Republic of)
Publication Date:
OSTI Identifier:
22304177
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ELECTRIC FIELDS; EVOLUTION; FERROELECTRIC MATERIALS; POLARIZATION; POLYCRYSTALS; RESIDUAL STRESSES; TIME RESOLUTION; X-RAY DIFFRACTION