Frequency Dependent Threshold in Bend Geometry of 5CB

Garg, Shila; Saeed, Salman; Wild, Steven; Bramley, E.N.; Kini, U. D.

doi:10.1080/10587259708041851

Cited by 1 publication

(4 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…mitted intensity increases continuously with voltage and Interestingly, the shape of the threshold versus f plots in of the sample just above threshold. Visual observation under crossed polarizers shows that the ® eld of view is our H = 0 data [24 ] is qualitatively similar to that of the conductivity versus frequency curves for some nematics ® lled with¯uctuating domains indicating turbulent¯ow with n changing continuously in a random way. In this ( [26 ]; ® gure 2.8 of ref.…”

Section: Investigation Of the Cut-o H ® Eldsupporting

confidence: 58%

“…Recent di erent experiments performed in this project. The construction of a variety of cells with di erent physical studies on 5CB have indicated [24] that thresholds as well as the direction of periodicity of PD depend on f . dimensions helps in the study of the scaling of thresholds.…”

Section: Ex Perimental Set-up and Resultsmentioning

confidence: 99%

“…Frequency dependence of threshold at H = 0 The e ect of frequency on the onset of instability was magnitude less than the calculated value for strong H. Hence, hysteresis ( if present) must be studied in the studied in the absence of H (® gure 3 of ref. [24] ). Cells 1 and 2 were used for this study and the thresholds were present case.…”

Section: Investigation Of the Cut-o H ® Eldmentioning

confidence: 93%

“…and destabilized by an a.c. E ® eld along the sample plane [16± 17 ]. Under the joint actions of H and E, a Is PD observed in [ 23,24] static or transient? An attempt is made to answer some of the above number of interesting deformations result.…”

Section: Introductionmentioning

confidence: 98%

See 3 more Smart Citations

Frequency variation of periodic distortion thresholds in a nematic liquid crystal

Garg¹,

Wild²,

Saeed³

et al. 1998

Liquid Crystals

Self Cite

View full text Add to dashboard Cite

Investigations are reported on the electric ® eld induced orientational transitions in the bend Fre Â edericksz geometry under the action of a stabilizing magnetic ® eld. When the magnetic ® eld is strong enough, the deformation above electric threshold is periodic with the periodicity disappearing at a higher voltage. The alignment does not remain homeotropic below threshold and the sample exhibits pretransitional biaxiality. Every transition is discontinuous and accompanied by hysteresis. The expected form of scaling appears to hold for all the observed thresholds. The thresholds and the direction of the wave vector are frequency dependent, showing that the instability mechanism involves electrical conductivity.

show abstract