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Title: Electric-field-induced paraelectric to ferroelectric phase transformation in prototypical polycrystalline BaTiO{sub 3}

An electric-field-induced paraelectric cubic to ferroelectric tetragonal phase transformation has been directly observed in prototypical polycrystalline BaTiO{sub 3} at temperatures above the Curie point (T{sub C}) using in situ high-energy synchrotron X-ray diffraction. The transformation persisted to a maximum temperature of 4 °C above T{sub C}. The nature of the observed field-induced transformation and the resulting development of domain texture within the induced phase were dependent on the proximity to the transition temperature, corresponding well to previous macroscopic measurements. The transition electric field increased with increasing temperature above T{sub C}, while the magnitude of the resultant tetragonal domain texture at the maximum electric field (4 kV mm{sup −1}) decreased at higher temperatures. These results provide insights into the phase transformation behavior of a prototypical ferroelectric and have important implications for the development of future large-strain phase-change actuator materials.
Authors:
; ;  [1] ;  [2] ;  [3]
  1. School of Materials Science and Engineering, UNSW Australia, Sydney, New South Wales 2052 (Australia)
  2. Institute of Materials Science, Technische Universität Darmstadt, 64287 Darmstadt (Germany)
  3. European Synchrotron Radiation Facility, Grenoble 38043 (France)
Publication Date:
OSTI Identifier:
22350947
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 16; 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; ACTUATORS; BARIUM COMPOUNDS; CURIE POINT; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; PHASE TRANSFORMATIONS; POLYCRYSTALS; STRAINS; SYNCHROTRON RADIATION; TEXTURE; TITANATES; TRANSFORMATIONS; X-RAY DIFFRACTION