Nanoscale domain patterns in ultrathin polymer ferroelectric films

P. Sharma, Tim J Reece, D. Wu, V. M. Fridkin, S. Ducharme, A. Gruverman

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

High-resolution studies of domain configurations in Langmuir-Blodgett films of ferroelectric polymer poly(vinylidene fluoride-trifluoroethylene), P(VDF-TrFE), have been carried out by means of piezoresponse force microscopy (PFM). Changes in film thickness and morphology cause significant variations in polarization patterns. In continuous films and nanomesas with relatively low thickness/grain aspect ratio (<1/10), the relationship between the average domain size and thickness follows the Kittel law. Nanomesas with high aspect ratio (>1/5) exhibit significant deviations from this law, suggesting additional surface-energy-related mechanisms affecting the domain patterns. Polarization reversal within a single crystallite has been demonstrated and local switching parameters (coercive voltage and remnant piezoresponse) have been measured by monitoring the local hysteresis loops. Reliable control of polarization at the sub-grain level demonstrates a possibility of studying the mechanism of the intrinsic switching behavior down to the molecular scale.

Original languageEnglish (US)
Article number485902
JournalJournal of Physics Condensed Matter
Volume21
Issue number48
DOIs
StatePublished - Dec 24 2009

Fingerprint

Ferroelectric films
Polymer films
Polarization
polymers
polarization
Langmuir Blodgett films
vinylidene
Langmuir-Blodgett films
Hysteresis loops
Interfacial energy
Ferroelectric materials
surface energy
Film thickness
fluorides
aspect ratio
Aspect ratio
Microscopic examination
Polymers
film thickness
hysteresis

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

Cite this

Nanoscale domain patterns in ultrathin polymer ferroelectric films. / Sharma, P.; Reece, Tim J; Wu, D.; Fridkin, V. M.; Ducharme, S.; Gruverman, A.

In: Journal of Physics Condensed Matter, Vol. 21, No. 48, 485902, 24.12.2009.

Research output: Contribution to journalArticle

Sharma, P. ; Reece, Tim J ; Wu, D. ; Fridkin, V. M. ; Ducharme, S. ; Gruverman, A. / Nanoscale domain patterns in ultrathin polymer ferroelectric films. In: Journal of Physics Condensed Matter. 2009 ; Vol. 21, No. 48.
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