ULTRASONIC ANOMALIES IN DEUTERATED BETAINE PHOSPHITE NEAR THE FERROELECTRIC PHASE-TRANSITION

Authors
SAMULIONIS V BANYS J VOLKEL G KLOPPERPIEPER A
Citation
V. Samulionis et al., ULTRASONIC ANOMALIES IN DEUTERATED BETAINE PHOSPHITE NEAR THE FERROELECTRIC PHASE-TRANSITION, Physica status solidi. a, Applied research, 168(2), 1998, pp. 535-541
Citations number
26
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. a, Applied research → ACNP
ISSN journal
00318965
Volume
168
Issue
2
Year of publication
1998
Pages
535 - 541
Database
ISI
SICI code
0031-8965(1998)168:2<535:UAIDBP>2.0.ZU;2-#
Abstract
Measurements of the longitudinal ultrasonic velocity and the attenuati on along the x-, y- and z-axes have been carried out in DBPI single cr ystals in the vicinity of the ferroelectric phase transition. Regardle ss of the weakness of elastic anomalies at T-c the ultrasonic behaviou r in DBPI can be explained by the Landau-Khalatnikov theory for uniaxi al ferroelectrics. The temperature dependence of the polarisation rela xation time was estimated to be tau = 10(-9)/(T-c - T) s.