Article: Effects of surface tension on the size-dependent ferroelectric characteristics of free-standing BaTiO3 nano-thin films

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TitleEffects of surface tension on the size-dependent ferroelectric characteristics of free-standing BaTiO3 nano-thin films
AuthorsSu, Y2
Chen, H4
Li, JJ1
Soh, AK4
Weng, GJ3
KeywordsCoercive field
Critical state
Domain structure
Ferroelectric characteristics
Ferroelectric property
Issue Date2011
PublisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
CitationJournal of Applied Physics, 2011, v. 110 n. 8, article no. 084108 [How to Cite?]
DOI: http://dx.doi.org/10.1063/1.3652906
AbstractIntrinsic surface tension of nanoscale ferroelectric thin film tends to induce tensile stress in its surface layer, whereas the other portion of the film is subjected to compression to maintain mechanical balance. A continuum-based phase-field model accounting for such surface effect has been set up to investigate the evolution of domain structure and thickness-dependent ferroelectric properties of free-standing BaTiO 3 nano-thin films. It was observed that both remnant polarization and coercive field decrease with a decrease of film thickness and increase of surface tension, and that, for film thickness ranging from 10-20 nm, both properties decreased sharply at the surface strain 2-3ε 0 (ε 0 being the spontaneous strain). Further decrease in film thickness or increase in surface tension could result in loss of ferroelectricity. Such a critical state for the ferroelectric-to-paraelectric transition has also been established for the range of film thickness 4-20 nm. © 2011 American Institute of Physics.
ISSN0021-8979
2011 Impact Factor: 2.168
2011 SCImago Journal Rankings: 0.139
DOIhttp://dx.doi.org/10.1063/1.3652906
ISI Accession Number IDWOS:000296519900114
ReferencesReferences in Scopus
DC Field
Value
dc.contributor.authorSu, Y
dc.contributor.authorChen, H
dc.contributor.authorLi, JJ
dc.contributor.authorSoh, AK
dc.contributor.authorWeng, GJ
dc.date.accessioned2012-07-16T09:46:52Z
dc.date.available2012-07-16T09:46:52Z
dc.date.issued2011
dc.description.abstractIntrinsic surface tension of nanoscale ferroelectric thin film tends to induce tensile stress in its surface layer, whereas the other portion of the film is subjected to compression to maintain mechanical balance. A continuum-based phase-field model accounting for such surface effect has been set up to investigate the evolution of domain structure and thickness-dependent ferroelectric properties of free-standing BaTiO 3 nano-thin films. It was observed that both remnant polarization and coercive field decrease with a decrease of film thickness and increase of surface tension, and that, for film thickness ranging from 10-20 nm, both properties decreased sharply at the surface strain 2-3ε 0 (ε 0 being the spontaneous strain). Further decrease in film thickness or increase in surface tension could result in loss of ferroelectricity. Such a critical state for the ferroelectric-to-paraelectric transition has also been established for the range of film thickness 4-20 nm. © 2011 American Institute of Physics.
dc.description.naturepublished_or_final_version
dc.identifier.citationJournal of Applied Physics, 2011, v. 110 n. 8, article no. 084108 [How to Cite?]
DOI: http://dx.doi.org/10.1063/1.3652906
dc.identifier.doihttp://dx.doi.org/10.1063/1.3652906
dc.identifier.hkuros200548
dc.identifier.isiWOS:000296519900114
dc.identifier.issn0021-8979
2011 Impact Factor: 2.168
2011 SCImago Journal Rankings: 0.139
dc.identifier.issue8, article no. 084108
dc.identifier.scopuseid_2-s2.0-80655139057
dc.identifier.urihttp://hdl.handle.net/10722/152712
dc.identifier.volume110
dc.languageeng
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://jap.aip.org/jap/staff.jsp
dc.publisher.placeUnited States
dc.relation.ispartofJournal of Applied Physics
dc.relation.referencesReferences in Scopus
dc.rightsJournal of Applied Physics. Copyright © American Institute of Physics.
dc.rightsCopyright (2011) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in (Journal of Applied Physics, 2011, v. 110 n. 8, article no. 084108) and may be found at (http://jap.aip.org/resource/1/japiau/v110/i8/p084108_s1).
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License
dc.subjectCoercive field
dc.subjectCritical state
dc.subjectDomain structure
dc.subjectFerroelectric characteristics
dc.subjectFerroelectric property
dc.titleEffects of surface tension on the size-dependent ferroelectric characteristics of free-standing BaTiO3 nano-thin films
dc.typeArticle
Author Affiliations
  1. City College of New York
  2. Beijing Institute of Technology
  3. Rutgers, The State University of New Jersey
  4. The University of Hong Kong