Ferroelectric-Paraelectric Phase Transitions in P(VDF-TrFE) Langmuir-Blodgett Films Studies by Optical Second Harmonic Generation

Abstract

Ferroelectric-paraelectric phase transitions are studied in Langmuir-Blodgett (LB) films of vinylidene fluoride with trifluoroethylene (P(VDF-TrFE)) by an electrpde-free method of optical second harmonic generation (SHG). The temperature dependences of the SHG intensity are studied for the LB films of the thickness down to a monolayer and two peculiarities attributed to two different ferroelectric-paraelectric phase transitions are observed. A qualitative correlation between the temperature dependences of the static dielectric constant and the SHG intensity is undedined. The results are interpreted in terms of the spontaneous polarization induced lack of the initially centrosymmetric structure of the film which gives rise to an electro-dipole SHG.

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Document Details

Document Type
Technical Report
Publication Date
Jun 23, 2000
Accession Number
ADP013076

Entities

People

  • S. P. Palto
  • T. V. Misuryaev
  • T. V. Murzina
  • V. M. Fridkin
  • Yu. G. Fokin

Organizations

  • Moscow State University

Tags

Communities of Interest

  • Advanced Electronics

DTIC Thesaurus Topics

  • Angle Of Incidence
  • Demographic Cohorts
  • Dielectric Permittivity
  • Electric Fields
  • Films
  • Intensity
  • Langmuir Blodgett Films
  • Low Temperature
  • Materials
  • Monomolecular Films
  • Nanostructures
  • Phase Transformations
  • Physics
  • Polarization
  • Second Harmonic Generation
  • Technical Information Centers
  • Transitions

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Polymer Science and Technology