Hypersonic frequency and damping anomalies in relaxor ferroelectric Pb(Zn1/3Nb2/3)O-3

Authors
Kuok, MH Ng, SC Fan, HJ Iwata, M Ishibashi, Y
Citation
Mh. Kuok et al., Hypersonic frequency and damping anomalies in relaxor ferroelectric Pb(Zn1/3Nb2/3)O-3, APPL PHYS L, 78(12), 2001, pp. 1727-1729
Citations number
15
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS LETTERS
ISSN journal
00036951 → ACNP
Volume
78
Issue
12
Year of publication
2001
Pages
1727 - 1729
Database
ISI
SICI code
0003-6951(20010319)78:12<1727:HFADAI>2.0.ZU;2-V
Abstract
Brillouin scattering from relaxor ferroelectric Pb(Zn1/3Nb2/3)O-3 has been measured between 296 and 780 K. Heating of the virgin Pb(Zn1/3Nb2/3)O-3 cry stal produced results that are different from those of subsequent heating o r cooling processes. An unusually broad softening of the longitudinal acous tic-mode frequency, due to the diffuse ferroelectric-phase transition, is o bserved. The attendant phonon damping is attributed to order-parameter fluc tuations. A huge temperature hysteresis, which eluded observation by other techniques, has been found. (C) 2001 American Institute of Physics.