X-RAY STUDIES OF THE HEXATIC PHASE IN LIQUID-CRYSTALS WITH A CRYSTAL-B-HEXATIC-B-SMECTIC-A PHASE SEQUENCE

Authors
GORECKA E CHEN L PYZUK W KROWCZYNSKI A KUMAR S
Citation
E. Gorecka et al., X-RAY STUDIES OF THE HEXATIC PHASE IN LIQUID-CRYSTALS WITH A CRYSTAL-B-HEXATIC-B-SMECTIC-A PHASE SEQUENCE, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 50(4), 1994, pp. 2863-2867
Citations number
19
Categorie Soggetti
Physycs, Mathematical","Phsycs, Fluid & Plasmas
Journal title
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics → ACNP
ISSN journal
1063651X
Volume
50
Issue
4
Year of publication
1994
Pages
2863 - 2867
Database
ISI
SICI code
1063-651X(1994)50:4<2863:XSOTHP>2.0.ZU;2-L
Abstract
Free-standing monodomain thick films of three liquid crystalline compo unds were examined by x-ray scattering. These compounds exhibit a uniq ue enantiotropic crystal-B-hexatic-B-smectic-A phase sequence with no evidence of herringbone order. The hexatic order parameter Cg changes in the hexatic phase with critical exponent beta=0.15+/-0.03. Temperat ure dependence of the in-plane positional order correlation length sug gests a strongly first-order hexatic-B to crystal-B phase transition w ith indiscernible enthalpy change.