In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 33, No. 10R ( 1994-10-01), p. 5850-
Abstract:
The orientational distribution in SmA, the switching behavior in SmC * ,
and the molecular orientation of SmC A * have been investigated by means of
polarized Raman scattering due to the C–C stretching of phenyl rings in two antiferroelectric liquid crystals. The scattered intensities, I Z Z (ω) and I Y Z (ω),
have been measured between crossed and parallel polars as a function of rotation angle, ω, of homogeneously aligned cells about their surface normal. The order parameters, 〈 P 2 〉 and 〈 P 4 〉 , and then the orientational distribution
function in SmA were obtained by utilizing the method of information entropy. The electric-field-induced reorientation was observed in the rotation angle dependence: I Z Z (ω)∝cos 4 (ω±Θ), where Θ is the tilt angle of
SmC * . The characteristic rotation angle dependence obtained in SmC A * was described as I Z (ω)∝{cos 4 (ω+Θ)+cos 4 (ω-Θ)}/2.
This result supports the molecular orientation of SmC A * so far proposed
that the molecules in adjacent layers tilt in the opposite senses.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.33.5850
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1994
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
2006801-3
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