Dielectric dispersion in the antiferroelectric liquid crystal MHPOBC

The dielectric dispersion in the ferroelectric and antiferroelectric phases of a smectic liquid crystal, 4-(1-methylheptyl-oxycarbonyl)phenyl 4'-octyloxybiphenyl-4-carboxylate (MHPOBC), has been measured with several frequencies between 100 Hz and 100 kHz. The soft mode with the Debye-type disp...

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Veröffentlicht in:	Japanese Journal of Applied Physics 1990-02, Vol.29 (2), p.L329-L332
Hauptverfasser:	FUKUI, M, ORIHARA, H, SUZUKI, A, ISHIBASHI, Y, YAMADA, Y, YAMAMOTO, N, MORI, K, NAKAMURA, K, SUZUKI, Y, KAWAMURA, I
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Dielectric properties of solids and liquids Dielectrics, piezoelectrics, and ferroelectrics and their properties Exact sciences and technology Permittivity (dielectric function) Physics
Online-Zugang:	Volltext
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Zusammenfassung:	The dielectric dispersion in the ferroelectric and antiferroelectric phases of a smectic liquid crystal, 4-(1-methylheptyl-oxycarbonyl)phenyl 4'-octyloxybiphenyl-4-carboxylate (MHPOBC), has been measured with several frequencies between 100 Hz and 100 kHz. The soft mode with the Debye-type dispersion was observed in the phase transition from the Sm A phase to the ferroelectric Sm C * phase. In the Sm C * phase, the Goldstone mode was observed at the frequency of about 4.5 kHz. The dielectric dispersion in the Sm C A * , Sm C α * and Sm C γ * phases is discussed.
ISSN:	0021-4922 1347-4065
DOI:	10.1143/jjap.29.l329