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Jo, Wook
Sustainable Functional Ceramics Lab
Research Interests
  • Lead-free piezoceramics, ultra - low temperature sintering, ferroelectrics, relaxor ferroelectrics, 2D materials, magnetoelectric materials, multiferroics

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Two-step polarization reversal in biased ferroelectrics

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Title
Two-step polarization reversal in biased ferroelectrics
Author
Daniels, John E.Cozzan, ClaytonUkritnukun, SupphatuchTutuncu, GoknurAndrieux, JeromeGlaum, JuliaDosch, ChrisJo, WookJones, Jacob L.
Issue Date
2014-06
Publisher
AMER INST PHYSICS
Citation
JOURNAL OF APPLIED PHYSICS, v.115, no.22, pp.224104
Abstract
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.
URI
https://scholarworks.unist.ac.kr/handle/201301/5108
URL
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84902436889
DOI
10.1063/1.4881835
ISSN
0021-8979
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