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Title: Soft Phonon Anomalies in the Relaxor Ferroelectric Pb(Zn{sub 1/3}Nb{sub 2/3}) {sub 0.92}Ti{sub 0.08}O{sub 3}

Abstract

Neutron inelastic scattering measurements of the polar transverse optic phonon mode dispersion in the cubic relaxor Pb(Zn{sub 1/3}Nb{sub 2/3}){sub 0.92}Ti{sub 0.08}O{sub 3} at 500 K reveal anomalous behavior in which the optic branch appears to drop precipitously into the acoustic branch at a finite value of the momentum transfer q=0.2 Angstrom{sup -1} measured from the zone center. We speculate that this behavior is the result of nanometer-sized polar regions in the crystal. (c) 2000 The American Physical Society.

Authors:
 [1];  [2];  [3]
  1. NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
  2. Materials Research Laboratory, The Pennsylvania State University, University Park, Pennsylvania 16802 (United States)
  3. Physics Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)
Publication Date:
OSTI Identifier:
20216620
Resource Type:
Journal Article
Journal Name:
Physical Review Letters
Additional Journal Information:
Journal Volume: 84; Journal Issue: 22; Other Information: PBD: 29 May 2000; Journal ID: ISSN 0031-9007
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FERROELECTRIC MATERIALS; PHONONS; NEUTRON DIFFRACTION; INELASTIC SCATTERING; DISPERSION RELATIONS; PZT; NIOBIUM OXIDES; EXPERIMENTAL DATA

Citation Formats

Gehring, P. M., Park, S.-E., and Shirane, G. Soft Phonon Anomalies in the Relaxor Ferroelectric Pb(Zn{sub 1/3}Nb{sub 2/3}) {sub 0.92}Ti{sub 0.08}O{sub 3}. United States: N. p., 2000. Web. doi:10.1103/PhysRevLett.84.5216.
Gehring, P. M., Park, S.-E., & Shirane, G. Soft Phonon Anomalies in the Relaxor Ferroelectric Pb(Zn{sub 1/3}Nb{sub 2/3}) {sub 0.92}Ti{sub 0.08}O{sub 3}. United States. doi:10.1103/PhysRevLett.84.5216.
Gehring, P. M., Park, S.-E., and Shirane, G. Mon . "Soft Phonon Anomalies in the Relaxor Ferroelectric Pb(Zn{sub 1/3}Nb{sub 2/3}) {sub 0.92}Ti{sub 0.08}O{sub 3}". United States. doi:10.1103/PhysRevLett.84.5216.
@article{osti_20216620,
title = {Soft Phonon Anomalies in the Relaxor Ferroelectric Pb(Zn{sub 1/3}Nb{sub 2/3}) {sub 0.92}Ti{sub 0.08}O{sub 3}},
author = {Gehring, P. M. and Park, S.-E. and Shirane, G.},
abstractNote = {Neutron inelastic scattering measurements of the polar transverse optic phonon mode dispersion in the cubic relaxor Pb(Zn{sub 1/3}Nb{sub 2/3}){sub 0.92}Ti{sub 0.08}O{sub 3} at 500 K reveal anomalous behavior in which the optic branch appears to drop precipitously into the acoustic branch at a finite value of the momentum transfer q=0.2 Angstrom{sup -1} measured from the zone center. We speculate that this behavior is the result of nanometer-sized polar regions in the crystal. (c) 2000 The American Physical Society.},
doi = {10.1103/PhysRevLett.84.5216},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 22,
volume = 84,
place = {United States},
year = {2000},
month = {5}
}