Soft Phonon Anomalies in the Relaxor Ferroelectric
  Pb(Zn_1/3Nb_2/3)_0.92Ti_0.08O_3

A. A. Bokov; A. Naberezhnov; B. Noheda; E. V. Colla; G. Burns; G. Burns; G. Shirane; G. Shirane; H. You; J. Kuwata; J. Kuwata; J. Zhao; L. Bellaiche; L. Bellaiche; N. de Mathan; P. M. Gehring; R. Blinc; R. F. Service; S. Vakhrushev; S.-E. Park; S.-E. Park; S.-E. Park; T. Tsurumi; V. Westphal

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Soft Phonon Anomalies in the Relaxor Ferroelectric Pb(Zn_1/3Nb_2/3)_0.92Ti_0.08O_3

Authors: A. A. Bokov
A. Naberezhnov
B. Noheda
E. V. Colla
G. Burns
G. Burns
G. Shirane
G. Shirane
H. You
J. Kuwata
J. Kuwata
J. Zhao
L. Bellaiche
L. Bellaiche
N. de Mathan
P. M. Gehring
R. Blinc
R. F. Service
S. Vakhrushev
S.-E. Park
S.-E. Park
S.-E. Park
T. Tsurumi
V. Westphal
Publication date: 7 February 2000
Publisher: 'American Physical Society (APS)'
Doi

Abstract

Neutron inelastic scattering measurements of the polar TO phonon mode dispersion in the cubic relaxor Pb(Zn_1/3Nb_2/3)_0.92Ti_0.08O_3 at 500K 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 inverse Angstroms, measured from the zone center. We speculate this behavior is the result of nanometer-sized polar regions in the crystal.Comment: 4 pages, 4 figure

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