Comparative x-ray and dielectric measurements of smectic A - smectic-C* 
transition in bulk and confined geometries

Sandhya, K. L.; Prasad, S. Krishna; Rao, D. S. Shankar; Bahr, Christian

doi:10.1103/PhysRevE.66.031710

Item

ITEM ACTIONSEXPORT

Add to Basket

Local TagsRelease HistoryDetailsSummary

Released

Journal Article

Comparative x-ray and dielectric measurements of smectic A - smectic-C^* transition in bulk and confined geometries

MPS-Authors

/persons/resource/persons173455

Bahr, Christian
Group Structure formation in soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

External Resource

No external resources are shared

Fulltext (restricted access)

There are currently no full texts shared for your IP range.

Fulltext (public)

There are no public fulltexts stored in PuRe

Supplementary Material (public)

There is no public supplementary material available

Citation

Sandhya, K. L., Prasad, S. K., Rao, D. S. S., & Bahr, C. (2002). Comparative x-ray and dielectric measurements of smectic A - smectic-C^* transition in bulk and confined geometries. Physical Review E, 66(3): 031710. doi:10.1103/PhysRevE.66.031710.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-B64D-B

Abstract

Comparative x-ray and dielectric measurements have been made on a liquid crystal exhibiting a smectic-A–chiral-smectic-C (smectic-C*) transition in bulk and confined geometries. It is observed that confining the material in Anopore membranes having 200-nm pore size leads to the following features: (1) the temperature dependence of the x-ray layer spacing shows a qualitatively different behavior, (2) in the smectic−A phase the soft mode relaxation frequency increases by a factor of 2.5, and (3) in the smectic−C* phase the relaxation frequency of the Goldstone mode increases dramatically by as much as 400 times, perhaps owing to a partial unwinding of the helix by the surface induced field.