Experimental Studies on Phase Transitions in an Antiferroelectric Liquid Crystal
The effect of optical purity on the antiferroelectric phase transition and the field-induced ferroelectric phase transition in Sm C A * were studied by means of dielectric measurements and observations of D - E hysteresis loops. The Curie-Weiss law was found to hold in Sm A and the Curie-Weiss const...
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Veröffentlicht in: | Japanese Journal of Applied Physics 1990-02, Vol.29 (2A), p.L333 |
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Hauptverfasser: | , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Online-Zugang: | Volltext |
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Zusammenfassung: | The effect of optical purity on the antiferroelectric phase transition and the field-induced ferroelectric phase transition in Sm C
A
*
were studied by means of dielectric measurements and observations of
D
-
E
hysteresis loops. The Curie-Weiss law was found to hold in Sm A and the Curie-Weiss constant to increase as the optical purity is reduced. Three types of
D
-
E
curves were obtained in the Sm C
A
*
phase. It was found that a double hysteresis loop changed into a single one at high frequencies. The results obtained are discussed on the basis of a phenomenological theory. |
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ISSN: | 0021-4922 1347-4065 |
DOI: | 10.1143/JJAP.29.L333 |