Micro-/macro-responses of a ferroelectric single crystal with domain pinning and depinning by dislocations

H. H. Wu, J. Wang, S. G. Cao, Long-qing Chen, T. Y. Zhang

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Phase field simulations are conducted to investigate the micro-structural signature and the macro-response of a ferroelectric single crystal with domain pinning and depinning phenomena by dislocation arrays. It is shown that due to the presence of the dislocation arrays, a domain with polarizations antiparallel to an applied field can survive under the small amplitude of applied field. The residual domain serves as a pre-existing nucleus during the following macroscopic switching via only domain wall motion. The pinned domain will be depinned when the external electric field amplitude exceeds a critical value, which highly depends on the dislocation spacing in the dislocation array. Due to the pinning and depinning effect, an asymmetric hysteresis loop of polarization versus electric field might appear when a bias field is applied.

Original languageEnglish (US)
Article number164108
JournalJournal of Applied Physics
Volume114
Issue number16
DOIs
StatePublished - Oct 28 2013

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single crystals
electric fields
polarization
domain wall
hysteresis
spacing
signatures
nuclei
simulation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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title = "Micro-/macro-responses of a ferroelectric single crystal with domain pinning and depinning by dislocations",
abstract = "Phase field simulations are conducted to investigate the micro-structural signature and the macro-response of a ferroelectric single crystal with domain pinning and depinning phenomena by dislocation arrays. It is shown that due to the presence of the dislocation arrays, a domain with polarizations antiparallel to an applied field can survive under the small amplitude of applied field. The residual domain serves as a pre-existing nucleus during the following macroscopic switching via only domain wall motion. The pinned domain will be depinned when the external electric field amplitude exceeds a critical value, which highly depends on the dislocation spacing in the dislocation array. Due to the pinning and depinning effect, an asymmetric hysteresis loop of polarization versus electric field might appear when a bias field is applied.",
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Micro-/macro-responses of a ferroelectric single crystal with domain pinning and depinning by dislocations. / Wu, H. H.; Wang, J.; Cao, S. G.; Chen, Long-qing; Zhang, T. Y.

In: Journal of Applied Physics, Vol. 114, No. 16, 164108, 28.10.2013.

Research output: Contribution to journalArticle

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AU - Wu, H. H.

AU - Wang, J.

AU - Cao, S. G.

AU - Chen, Long-qing

AU - Zhang, T. Y.

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AB - Phase field simulations are conducted to investigate the micro-structural signature and the macro-response of a ferroelectric single crystal with domain pinning and depinning phenomena by dislocation arrays. It is shown that due to the presence of the dislocation arrays, a domain with polarizations antiparallel to an applied field can survive under the small amplitude of applied field. The residual domain serves as a pre-existing nucleus during the following macroscopic switching via only domain wall motion. The pinned domain will be depinned when the external electric field amplitude exceeds a critical value, which highly depends on the dislocation spacing in the dislocation array. Due to the pinning and depinning effect, an asymmetric hysteresis loop of polarization versus electric field might appear when a bias field is applied.

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