Bistability in deformed helix ferroelectric liquid crystal (DHFLC) has been investigated by electro-optical and dielectric methods and compared with the bistability phenomenon in surface stabilized ferroelectric liquid crystal (SSFLC). Bistability in DHFLC as well as SSFLC is based on different physical phenomena. In SSFLC, it occurs due to surface effect and in DHFLC, by the critical deformation of the helix, under the application of time delayed square voltage pulse of known magnitude and frequency. Memory behavior of DHFLC and SSFLC cells has been compared by optical, electrical, dielectric, and hysteresis methods and the difference has been analyzed. It has been observed that memory effect in DHFLC is independent of surface effect but critically depends on the applied voltage and frequency of time delayed square wave pulse.

1.
G. B.
 
Cohen
,
R.
 
Progrets
,
K.
 
Vinokur
, and
D.
 
Davidov
,
Appl. Opt.
 
36
(
2
),
455
(
1997
).
Google Scholar
Crossref
Search ADS
PubMed
 
2.
J.
 
Fünfschilling
 and
M.
 
Schadt
,
Jpn. J. Appl. Phys., Part 1
 
30
(
4
),
741
(
1991
).
Google Scholar
 
3.
N. A.
 
Clark
 and
S. T.
 
Lagerwall
,
Appl. Phys. Lett.
https://doi.org/10.1063/1.91359
 
36
,
899
(
1980
).
Google Scholar
Crossref
Search ADS
 
4.
M.
 
Maeda
,
M.
 
Nixamori
, and
I.
 
Suzuki
,
Mol. Cryst. Liq. Cryst.
 
103
,
366
(
2001
).
Google Scholar
 
5.
M. A.
 
Handschy
,
N. A.
 
Clark
, and
S. T.
 
Lagerwall
,
Phys. Rev. Lett.
https://doi.org/10.1103/PhysRevLett.51.471
 
51
,
471
(
1983
).
Google Scholar
Crossref
Search ADS
 
6.
J. S.
 
Patel
 and
J. W.
 
Goodby
,
J. Appl. Phys.
https://doi.org/10.1063/1.336333
 
59
,
2355
(
1986
).
Google Scholar
Crossref
Search ADS
 
7.
H.
 
Takzoe
,
Y.
 
Ouchi
,
K.
 
Ishikawa
, and
A.
 
Fukuda
,
Mol. Cryst. Liq. Cryst.
 
139
,
27
(
1986
).
Google Scholar
Crossref
Search ADS
 
8.
M.
 
Ozaki
,
T.
 
Hatai
, and
K.
 
Yoshino
,
Jpn. J. Appl. Phys., Part 2
 
29
(
4
),
L625
(
1990
).
Google Scholar
 
9.
T.
 
Tsuchiya
,
H.
 
Takezoe
, and
A.
 
Fukuda
,
Jpn. J. Appl. Phys., Part 2
 
25
(
1
),
L27
(
1986
).
Google Scholar
 
10.
M.
 
Ozaki
,
S.
 
Kishio
,
K.
 
Yoshino
,
M. Mc.
 
Kaini
,
R.
 
Higuchi
, and
T.
 
Sakurai
,
Jpn. J. Appl. Phys., Suppl.
 
26
,
110
(
1987
).
Google Scholar
Crossref
Search ADS
 
11.
S.
 
Nishiyma
,
Y.
 
Quchi
,
H.
 
Takezoe
, and
A.
 
Fukuda
,
Jpn. J. Appl. Phys., Part 1
 
26
,
1757
(
1987
).
Google Scholar
 
12.
S. S.
 
Bawa
,
K.
 
Saxena
,
A. M.
 
Biradar
,
K. K.
 
Saini
, and
Subhash
 
Chandra
,
Phys. Status Solidi A
 
118
,
561
(
1990
).
Google Scholar
Crossref
Search ADS
 
13.
L. A.
 
Beresnev
,
V. G.
 
Chingrinov
,
D. I.
 
Dergachev
,
E. P.
 
Poshidaev
,
J.
 
Fünfschilling
, and
M.
 
Schadt
,
Liq. Cryst.
 
5
(
4
),
1171
(
1989
).
Google Scholar
Crossref
Search ADS
 
14.
David J.
 
Griffiths
,
Introduction to Electrodynamics
, 3rd ed. (
Prentice-Hall, Inc.
, Englewood Cliffs, N.J., U.S.A), pp.
278
–
81
.
15.
S. S.
 
Bawa
,
A. M.
 
Biradar
, and
S.
 
Chandra
,
Ferroelectrics
 
76
,
69
(
1987
).
Google Scholar
Crossref
Search ADS
 
16.
N. A.
 
Clark
,
M. A.
 
Hadschy
, and
S. T.
 
Lagerwall
,
Mol. Cryst. Liq. Cryst.
 
94
,
213
(
1983
).
Google Scholar
Crossref
Search ADS
 
17.
Yu. P.
 
Panarin
,
Mol. Mater.
 
2
,
137
(
1993
).
Google Scholar
 
18.
S.
 
Hiller
,
A. M.
 
Biradar
,
S.
 
Wrobel
, and
W.
 
Haase
,
Phys. Rev. E
https://doi.org/10.1103/PhysRevE.53.641
 
53
(
1
),
641
(
1996
).
Google Scholar
Crossref
Search ADS
 
19.
A. M.
 
Biradar
,
E. P.
 
Haridas
, and
Subhash
 
Chandra
,
Ferroelectrics
 
189
,
181
(
1996
).
Google Scholar
Crossref
Search ADS
 
20.
E. P.
 
Haridas
,
A. M.
 
Biradar
,
G. K.
 
Chadha
, and
Subhash
 
Chandra
,
Mol. Mater.
 
12
,
75
(
2000
).
Google Scholar
 
© 2004 American Institute of Physics.
2004
American Institute of Physics
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