BRILLOUIN SCATTERING EXPERIMENTS IN THE FERROELECTRIC CRYSTAL TRIGLYCINE SULFATE

Abstract

Brillouin scattering measurements were made on triglycine sulfate near its Curie temperature (TC). Temperature and field dependent single relaxation time acoustic velocity dispersion was found in confirmation of the predictions of a simple free energy expansion theory of the dynamics of the strain and polarization fluctuations near TC. Additional experimental results obtained for triglycine sulfate include measurement of the acoustic mode velocities for all three modes for various directions in the (010) plane, measurement of the longitudinal velocity along the ferroelectric axis, a measurement of a reference absolute cross section for Brillouin scattering in triglycine sulfate, and determination of some of the Pockels coefficients from the Brillouin component intensity in various directions.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1967
Accession Number
AD0658167

Entities

People

  • Herman Z. Cummins
  • Robert W. Gammon

Organizations

  • Johns Hopkins University

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Brillouin Scattering
  • Crystal Lattice Vibrations
  • Crystal Lattices
  • Crystal Structure
  • Dielectric Properties
  • Doppler Effect
  • Elastic Properties
  • Electric Fields
  • Electromagnetic Fields
  • Free Energy
  • Heat Energy
  • Measurement
  • Optical Properties
  • Phase Transformations
  • Refractive Index
  • Transition Temperature
  • Transitions

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Optical Physics and Photonics.