Browsing Electronic & Electrical Eng (Scholarly Publications) by Author "VIJ, JAGDISH"
Now showing items 1-20 of 58
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Alignment instability caused by anchoring of the in-plane directors to the rubbing direction in the V-shaped switching
VIJ, JAGDISH; PANARIN, YURI; FUKUDA, ATSUO (2000)In order to investigate the molecular alignment in the smectic liquid crystals showing the V-shaped switching behavior, two types of the liquid crystal cells, a sandwiched cell and an open cell, were prepared. ... -
Anomalous dependence of response time on the electric field in an electroclinic liquid crystal with large induced tilt and polarization
VIJ, JAGDISH; MANNA, UTTAM; SONG, JANG-KUN (2009)We investigate the response time of an electroclinic liquid crystal with large induced tilt and polarization (de Vries smectic A*). The response time is found to increase with the increase in electric field up to a threshold ... -
Anomalous temperature dependence of layer spacing of de Vries liquid crystals: Compensation model
VIJ, JAGDISH (2016)Smectic liquid crystals that exhibit temperature independent layer thickness offer technological advantages for their use in displays and photonic devices. The dependence of the layer spacing in SmA and SmC phases of de ... -
Antiferroelectric and ferroelectric orderings in frustrated chiral tilted smectics and a continuous change from anticlinic SmCA* to synclinic SmC*
VIJ, JAGDISH (2010)In a frustrated binary-mixture system of ferroelectric and antiferroelectric liquid crystals, where the border line between SmCA* and SmC* in the temperature-concentration phase diagram runs almost parallel to the ordinate ... -
Antiferroelectric dielectric relaxation processes and the interlayer interaction in antiferroelectric liquid crystals
VIJ, JAGDISH; SONG, JANG-KUN; FUKUDA, ATSUO; MANNA, UTTAM (2008)Antiphase relaxation process of antiferroelectric phase is investigated in binary mixtures of antiferroelectric and ferroelectric liquid crystalline compounds. It is found that the frequency of the antiphase mode ranges ... -
Biaxial order and a rotation of the minor director in the nematic phase of an organo-siloxane tetrapode by the electric field
VIJ, JAGDISH (2012)Biaxiality in the nematic phase for a liquid crystalline tetrapode made up of organo-siloxanes mesogens is investigated using polarized infrared spectroscopy. An ordering of the minor director for the homeotropically aligned ... -
Chirality of an achiral bent-core nematic mesogen observed in planar and homeotropic cells under certain boundary conditions
VIJ, JAGDISH (2012)It is shown that planar and homeotropic cells under certain boundary conditions containing an achiral bent-core C5 liquid crystalline material show chiral domains of opposite handedness. However such domains are not seen ... -
Conoscopy of chiral smectic liquid crystal cells
VIJ, JAGDISH; SONG, JANG-KUN (2008)The conoscopic method for investigating the optical properties of a liquid crystal cell is studied with the aim of determining the effects of the approximations used in the calculation on the results. We confirm that the ... -
Debye process and dielectric state of an alcohol in a nonpolar solvent.
VIJ, JAGDISH (2011)To investigate the origin of the first order molecular kinetics of the most prominent, Debye-type polarization, a detailed dielectric relaxation study of 66.5, 40, and 20 mole solutions of 5-methyl-2-hexanol in 2-methylpentane ... -
Degeneracy lifting due to thermal fluctuations around the frustration point between anticlinic antiferroelectric SmCA* and synclinic ferroelectric SmC*
VIJ, JAGDISH; FUKUDA, ATSUO (2013)In the binary mixture phase diagram of MC881 and MC452, the borderline between anticlinic antiferroelectric SmC?A and synclinic ferroelectric SmC? becomes apparently parallel to the temperature ordinate axis at the critical ... -
Dependence of the molecular orientational states on the surface conditions for the "V-shaped switching" in a ferroelectriclike liquid crystal sample
VIJ, JAGDISH; FUKUDA, ATSUO; PANOV, VITALI (2001)The three-component mixture showing the V-shaped switching in a rubbing cell is investigated using a temperature gradient cell (TGC) where the epitaxial method of alignment, but without an alignment layer, is used. The ... -
Dielectric and electro-optic studies of a bimesogenic liquid crystal composed of bent-core and calamitic units
VIJ, JAGDISH; PANOV, VITALI (2014)A bimesogen, BR1, composed of a bent-core and calamitic unit, linked laterally via a flexible spacer is investigated by dielectric and electro-optic techniques. X-ray results show the presence of clusters in the nematic ... -
Dielectric relaxation and crystallization of nanophase separated 1-propanol-isoamylbromide mixture
VIJ, JAGDISH (2007)The effects of liquid-liquid phase separation on molecular relaxation of an apparently homogeneous mixture of 1-propanol and isoamylbromide has been studied by dielectric spectroscopy over a broad frequency and temperature ... -
Discontinuous change in the smectic layer thickness in ferrielectric liquid crystals
VIJ, JAGDISH; PANARIN, YURI; PANOV, VITALI (2007)The temperature dependence of the thickness of thick free-standing films is studied using a high-resolution film thickness measurement technique. A small discontinuity in the temperature dependence of the smectic layer ... -
Discrete flexoelectric polarizations and biaxial subphases with periodicities other than 3- and 4-layers in chiral smectic liquid crystals frustrated between ferroelectricity and antiferroelectricity
VIJ, JAGDISH; PANOV, VITALI; FUKUDA, ATSUO (2005)The subphase for the temperature range that lies in between Sm-CA* and the three-layer Sm-CA*(1 3) subphase has been confirmed to exist using the measurements of electric-field-induced birefringence, optical rotation, and ... -
Dynamic mechanism of the ferroelectric to antiferroelectric phase transition in chiral smectic liquid crystals
VIJ, JAGDISH; FUKUDA, ATSUO; SONG, JANG-KUN (2008)We report on the observation of V-shaped switching in a ferroelectric liquid crystal cell over a wide range of temperatures. Results of the optical transmittance in the visible region give us the helical pitch for various ... -
Effect of cell surfaces on the stability of chiral smectic- C phases
VIJ, JAGDISH; MANNA, UTTAM; SONG, JANG-KUN (2008)The effect of surfaces on the stability of smectic-C* (SmC*) variant phases is investigated. The results obtained using dielectric spectroscopy by varying the cell thickness show that the temperature ranges of SmC<sub>al ... -
The effect of confinement on the stability of field induced states and on supercooling in antiferro-ferroelectric phase transitions in chiral smectic liquid crystals
VIJ, JAGDISH (2009)We investigate both the supercooling and the hysteresis phenomena of the phase transitions between the smectic C* and the smectic C *Aphases driven by temperature and electric field, respectively. These two phenomena show ... -
Effect of cybotactic clusters on the elastic and flexoelectric properties of bent-core liquid crystals belonging to the same homologous series
VIJ, JAGDISH; PANOV, VITALI (2013)We report results of the splay ( K 11 ) and bend ( K 33 ) elastic constants and the effective flexoelectric coefficient of three bent-core liquid crystals belonging to a homologous series of 4-cyanoresorcinol ... -
Effect of molecular-scale surface morphology on the surface melting of liquid crysals on self-assembly monolayers
VIJ, JAGDISH (2014)We devised liquid crystal cell substrates with different surface roughnesses at the molecular scale by controlling the density of two types of trichlorosilanes with different alkyl chain lengths. We investigated surface ...