Dielectric spectroscopy and electrooptic studies of new MHPOBC analogues

Two new MHPOBC analogues, exhibiting ferroelectric and antiferroelectric phases, have been studied by means of frequency domain dielectric spectroscopy, time domain spectroscopy and electrooptic methods. Temperature dependencies of the tilt angle and spontaneous polarization have been measured. A re...

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Bibliographic Details
Published in:Ferroelectrics 1998-01, Vol.212 (1), p.79-90
Main Authors: Fafara, A., Gestblom, B., Wróbel, S., Dabrowski, R., Drzewiñski, W., Kilian, D., Haase, W.
Format: Article
Language:English
Subjects:
antiferroelectricity
dielectric spectroscopy
ferroelectricity
liquid crystals
spontaneous polarization
tilt angle
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Summary:Two new MHPOBC analogues, exhibiting ferroelectric and antiferroelectric phases, have been studied by means of frequency domain dielectric spectroscopy, time domain spectroscopy and electrooptic methods. Temperature dependencies of the tilt angle and spontaneous polarization have been measured. A reversal current method has been applied to distinguish between the ferroelectric and antiferroelectric phases. Two relaxation processes at low frequencies and one broad spectrum at high frequencies have been revealed in the antiferroelectric phases of both substances studied by dielectric spectroscopy.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150199808217353