TY - JOUR
T1 - Electro-optic and piezo-optic studies of an antiferro-ferri- ferro-electric system
AU - Robinson, W. K.
AU - Carboni, C.
AU - Gleeson, H. F.
AU - Hird, M.
AU - Styring, P.
AU - Seed, A.
N1 - Funding Information:
This work has been carried out under a collaboration supported by the EPSRC and the MOD (grant numbers GR/H95860 and GRIH96249). The high pressure apparatus was established under an EPSRC project (grant number GWG09238). WKR also thanks the EPSRC for a studentship and support to attend this conference. The authors are grateful to H Walton for assistance with current pulse measurements.
PY - 1995/4
Y1 - 1995/4
N2 - A detailed study of a novel material exhibiting antiferro-, ferri-, and ferroelectric phases has been undertaken. The tilt angle, spontaneous polarisation and the dynamics of the helical unwinding have been examined as a function of temperature and voltage in all the phases of interest. The material exhibits large tilt angles (-31°) and values of spontaneous polarisation (~100nCcM-2) in cases where the helix is totally unwound. The behaviour of tilt angle as a function of applied electric field is examined in the ferri- and antiferro-electric phases. A stepwise increase in tilt angle as a function of applied voltage in the ferri-electric phase is presented, as well as unusual behaviour in the antiferro-electric state. In addition, a preliminary investigation of the change in spontaneous polarisation as a function of pressure is presented. It is shown that the dependence of spontaneous polarisation in the ferroelectric phase is relatively weak.
AB - A detailed study of a novel material exhibiting antiferro-, ferri-, and ferroelectric phases has been undertaken. The tilt angle, spontaneous polarisation and the dynamics of the helical unwinding have been examined as a function of temperature and voltage in all the phases of interest. The material exhibits large tilt angles (-31°) and values of spontaneous polarisation (~100nCcM-2) in cases where the helix is totally unwound. The behaviour of tilt angle as a function of applied electric field is examined in the ferri- and antiferro-electric phases. A stepwise increase in tilt angle as a function of applied voltage in the ferri-electric phase is presented, as well as unusual behaviour in the antiferro-electric state. In addition, a preliminary investigation of the change in spontaneous polarisation as a function of pressure is presented. It is shown that the dependence of spontaneous polarisation in the ferroelectric phase is relatively weak.
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U2 - 10.1080/10587259508033571
DO - 10.1080/10587259508033571
M3 - Article
AN - SCOPUS:0029222808
VL - 263
SP - 69
EP - 79
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
SN - 0026-8941
IS - 1
ER -