APPLICATION OF A FRONT DETECTION PHOTOPYROELECTRIC CONFIGURATION TO THE STUDY OF NONLINEAR EFFECTS IN LIQUID-CRYSTALS PHASE-TRANSITIONS

Authors
MERCURI F MARINELLI M ZAMMIT U PIZZOFERRATO R SCUDIERI F
Citation
F. Mercuri et al., APPLICATION OF A FRONT DETECTION PHOTOPYROELECTRIC CONFIGURATION TO THE STUDY OF NONLINEAR EFFECTS IN LIQUID-CRYSTALS PHASE-TRANSITIONS, Journal de physique. IV, 4(C7), 1994, pp. 253-256
Citations number
3
Categorie Soggetti
Physics
Journal title
Journal de physique. IV → ACNP
ISSN journal
11554339
Volume
4
Issue
C7
Year of publication
1994
Pages
253 - 256
Database
ISI
SICI code
1155-4339(1994)4:C7<253:AOAFDP>2.0.ZU;2-R
Abstract
The aim of this paper is to present an experimental configuration whic h enables the use of the pyroelectric transducer in the front detectio n configuration. This configuration has been applied to the study of t hermal parameters in the vicinity of two phase transitions of 9CB liqu id crystal. Anomalies have been found in the phase of the photopyroele ctric signal near the phase transitions. Strong nonlinear effects have been detected both in the 2 omega signal amplitude and phase.