Birefringence and tilt angle in the antiferroelectric, ferroelectric, and intermediate phases of chiral smectic liquid crystals

نویسندگان

  • M. Škarabot
  • Mojca Čepič
  • B. Žekš
  • R. Blinc
  • G. Heppke
  • A. V. Kityk
  • I. Muševič
چکیده

M. Škarabot, Mojca Čepič, B. Žekš, R. Blinc, G. Heppke, A. V. Kityk,* and I. Muševič J. Stefan Institute, Jamova 39, 1111 Ljubljana, Slovenia Faculty of Education, Kardeljeva ploščad 16, 1000 Ljubljana, Slovenia Institute of Biophysics, Medical Faculty, Lipičeva 2, 1105 Ljubljana, Slovenia Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, Ljubljana, Slovenia Iwan-N-Stranski-Institut, Technische Universität Berlin, Sekretariat ER 11, Str. des 17, Juni 135, D-10623 Berlin, Germany ~Received 10 February 1998!

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Electro-optic and dielectric study of the de Vries-type smectic-A* phase exhibiting transitions to smectic-C*A and smectic-C* phases.

Mixtures of different compositions of an antiferroelectric liquid crystal compound that exhibits direct smectic-A*(Sm-A*)-smectic-C*(A) (Sm-C*(A)) transition with a ferroelectric liquid crystal compound that exhibits Sm-A*-smectic-C*(Sm-C*) transition are studied using electro-optics and dielectric spectroscopy. The results of optical texture, birefringence, and the tilt angle suggest that a pa...

متن کامل

Remarkably wide four-layer smectic phases in mixtures of liquid crystals and highly chiral dopants

A series of liquid crystalline mixtures that exhibit remarkably stable 4-layer intermediate phases, with phase ranges of around 30 uC, are reported. The mixtures are formed from a seleniumcontaining antiferroelectric material combined with up to 9% (by weight) of a highly chiral dopant. Various experimental methods including X-ray scattering and electro-optic techniques were employed in order t...

متن کامل

Dynamic mechanism of the ferroelectric to antiferroelectric phase transition in chiral smectic liquid crystals.

The temperature-induced phase transition between the chiral smectic phases, antiferroelectric (smectic-C(A)*) and ferroelectric (smectic-C*), is found to occur through solitary wave propagation. We measure the free energy, which shows a double well shape in the entire SmC(A)* temperature range and the global minimum is found to shift from the antiferroelectric order to the ferroelectric order a...

متن کامل

Extension of the Hamaneh-Taylor model using the macroscopic polarization for the description of chiral smectic liquid crystals.

Chiral smectic liquid crystals exhibit a series of phases, including ferroelectric, antiferroelectric, and ferrielectric commensurate structures as well as an incommensurate Sm-Calpha* phase. We carried out an extension of the phenomenological model recently presented by Hamaneh and Taylor based on the distorted-clock model. The salient feature of this model is that it links the appearance of p...

متن کامل

Cyclic ureas as novel building blocks for bent-core liquid crystals.

Cyclic ureas represent a new class of bent-core liquid crystals which, depending on the ring size and other structural parameters, can form a series of polar (ferroelectric and antiferroelectric), as well as non-polar, tilted and non-tilted smectic and undulated smectic phases.

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1998