In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 36, No. 4R ( 1997-04-01), p. 2218-
Abstract:
Ferroelectricity and spontaneous polarization of two compounds were investigated by plotting polarization versus electric field with a sine waveform in conjunction with other conventional methods such as optical polarizing microscopy and differential scanning calorimetry. The compounds are 4 ′ -[(s)-2-methylbutoxycarbonyl] phenyl 4-(4 ′ -n-nonyloxy-2,3,5,6-tetrafluorobiphenyl-1-ethynyl) benzoate and 4 ′ -[(s)-2-methylbutoxycarbonyl] phenyl 4 ′′ -[(4-n-nonyloxy-2,3,5,6-tetrafluorophenyl) ethynyl] benzoate. They show polarizations of 8.9 and 12.6×10 -6 C/m 2 and tilt angles of 9.2 and 20° at the temperature at which 10° C below their curie point, respectively. The curie point, that is, the mesophase transition between the smectic A and the chiral smectic C phases occurs, was identified from the polarization versus electric field hysteresis, and a ferroelectric phase temperature range of 108° C was found in these materials.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.36.2218
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1997
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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