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Article: Unique vortex and stripe domain structures in PbTiO 3 epitaxial nanodots

TitleUnique vortex and stripe domain structures in PbTiO 3 epitaxial nanodots
Authors
KeywordsEpitaxial Nanodots
Ferroelectric
Mismatch Strains
Phase-Field Model
Vortex
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/mechmat
Citation
Mechanics of Materials, 2011, v. 43 n. 6, p. 342-347 How to Cite?
Abstract
The domain structures of PbTiO 3 epitaxial nanodots under the influences of depolarization fields and mismatch strains have been studied using three dimensional phase field simulations. The single-vortex structure and mixed domain configuration, which consisted of zigzag stripe domain and closure dipole flux near the interfaces, were found to be effective in annihilating the depolarization fields in the isotropically tensile and compressive ferroelectric nanodots, respectively. These domain structures were produced by the combined effect of electrostatic and mismatch elastic energies. The width of stripe domain was found to be related to the volume percentage of polarization dipoles along the z-axis, which varied remarkably with the change of compressive mismatch strain. In the case of nanodots under anisotropic mismatch strains, double-vortex domain patterns and stripe domains with nearly straight domain walls were formed. Moreover, the domain structures with electrostatic energy neglected were also studied. © 2011 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/157112
ISSN
2013 Impact Factor: 2.225
2013 SCImago Journal Rankings: 1.280
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative Region, ChinaHKU716508E
716007E
Computer Center of The University of Hong Kong
Funding Information:

Support from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project Nos. HKU716508E and 716007E) is acknowledged. The authors gratefully acknowledge the support of the Computer Center of The University of Hong Kong.

References

 

Author Affiliations
  1. The University of Hong Kong
DC FieldValueLanguage
dc.contributor.authorHong, Len_US
dc.contributor.authorSoh, AKen_US
dc.date.accessioned2012-08-08T08:45:23Z-
dc.date.available2012-08-08T08:45:23Z-
dc.date.issued2011en_US
dc.identifier.citationMechanics of Materials, 2011, v. 43 n. 6, p. 342-347en_US
dc.identifier.issn0167-6636en_US
dc.identifier.urihttp://hdl.handle.net/10722/157112-
dc.description.abstractThe domain structures of PbTiO 3 epitaxial nanodots under the influences of depolarization fields and mismatch strains have been studied using three dimensional phase field simulations. The single-vortex structure and mixed domain configuration, which consisted of zigzag stripe domain and closure dipole flux near the interfaces, were found to be effective in annihilating the depolarization fields in the isotropically tensile and compressive ferroelectric nanodots, respectively. These domain structures were produced by the combined effect of electrostatic and mismatch elastic energies. The width of stripe domain was found to be related to the volume percentage of polarization dipoles along the z-axis, which varied remarkably with the change of compressive mismatch strain. In the case of nanodots under anisotropic mismatch strains, double-vortex domain patterns and stripe domains with nearly straight domain walls were formed. Moreover, the domain structures with electrostatic energy neglected were also studied. © 2011 Elsevier Ltd. All rights reserved.en_US
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/mechmaten_US
dc.relation.ispartofMechanics of Materialsen_US
dc.rightsNOTICE: this is the author’s version of a work that was accepted for publication in Mechanics of Materials. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Mechanics of Materials, 2011, v. 43 n. 6, p. 342-347. DOI: 10.1016/j.mechmat.2011.04.002-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectEpitaxial Nanodotsen_US
dc.subjectFerroelectricen_US
dc.subjectMismatch Strainsen_US
dc.subjectPhase-Field Modelen_US
dc.subjectVortexen_US
dc.titleUnique vortex and stripe domain structures in PbTiO 3 epitaxial nanodotsen_US
dc.typeArticleen_US
dc.identifier.emailSoh, AK:aksoh@hkucc.hku.hken_US
dc.identifier.authoritySoh, AK=rp00170en_US
dc.description.naturepostprint-
dc.identifier.doi10.1016/j.mechmat.2011.04.002en_US
dc.identifier.scopuseid_2-s2.0-79955441845en_US
dc.identifier.hkuros191562-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79955441845&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume43en_US
dc.identifier.issue6en_US
dc.identifier.spage342en_US
dc.identifier.epage347en_US
dc.identifier.isiWOS:000291834000005-
dc.publisher.placeNetherlandsen_US
dc.identifier.scopusauthoridHong, L=23985073500en_US
dc.identifier.scopusauthoridSoh, AK=7006795203en_US
dc.identifier.citeulike9188233-

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