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Article: Unique vortex and stripe domain structures in PbTiO 3 epitaxial nanodots
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TitleUnique vortex and stripe domain structures in PbTiO 3 epitaxial nanodots
 
AuthorsHong, L1
Soh, AK1
 
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
 
CitationMechanics of Materials, 2011, v. 43 n. 6, p. 342-347 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.mechmat.2011.04.002
 
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.
 
ISSN0167-6636
2012 Impact Factor: 1.936
2012 SCImago Journal Rankings: 1.224
 
DOIhttp://dx.doi.org/10.1016/j.mechmat.2011.04.002
 
ISI Accession Number IDWOS:000291834000005
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.

 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorHong, L
 
dc.contributor.authorSoh, AK
 
dc.date.accessioned2012-08-08T08:45:23Z
 
dc.date.available2012-08-08T08:45:23Z
 
dc.date.issued2011
 
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.
 
dc.description.naturepostprint
 
dc.identifier.citationMechanics of Materials, 2011, v. 43 n. 6, p. 342-347 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.mechmat.2011.04.002
 
dc.identifier.citeulike9188233
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.mechmat.2011.04.002
 
dc.identifier.epage347
 
dc.identifier.hkuros191562
 
dc.identifier.isiWOS:000291834000005
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.

 
dc.identifier.issn0167-6636
2012 Impact Factor: 1.936
2012 SCImago Journal Rankings: 1.224
 
dc.identifier.issue6
 
dc.identifier.scopuseid_2-s2.0-79955441845
 
dc.identifier.spage342
 
dc.identifier.urihttp://hdl.handle.net/10722/157112
 
dc.identifier.volume43
 
dc.languageeng
 
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/mechmat
 
dc.publisher.placeNetherlands
 
dc.relation.ispartofMechanics of Materials
 
dc.relation.referencesReferences in Scopus
 
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 Nanodots
 
dc.subjectFerroelectric
 
dc.subjectMismatch Strains
 
dc.subjectPhase-Field Model
 
dc.subjectVortex
 
dc.titleUnique vortex and stripe domain structures in PbTiO 3 epitaxial nanodots
 
dc.typeArticle
 
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Author Affiliations
  1. The University of Hong Kong