Critical behavior of the layer compressional elastic constant B at the smectic-Anematic phase transition
Physical Review B, ISSN: 0163-1829, Vol: 41, Issue: 13, Page: 9032-9037
1990
- 36Citations
- 2Captures
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Metrics Details
- Citations36
- Citation Indexes36
- 36
- CrossRef28
- Captures2
- Readers2
Article Description
The temperature dependence of the layer compressional elastic constant B has been studied in four different compounds. Two of them, 4-cyano-4-(n-octyl) biphenyl and 4-cyano-4-(n-octyloxy)biphenyl, are polar and give partially bilayered smectic-Ad phases while the remaining two are nonpolar and present monolayered smectic-Am phases. In all cases, the smectic-A to nematic phase transition was found to be second order. A second-sound resonance technique has been used to measure, the critical exponent of B on approaching the nematic phase. The values found lie in between 0.39 and 0.42, while the uncertainty is about 0.03. Although the nematic smectic-A transition does not belong to a single universality class the exponents are much less scattered than previously reported, with a mean exponent of 0.41 being consistent with the four reported values. When available, in the case of polar compounds, the set of critical exponents measured by calorimetry or x-ray scattering together with seems to be accounted for by the anisotropic model of the smectic-A nematic phase transition. © 1990 The American Physical Society.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0000545473&origin=inward; http://dx.doi.org/10.1103/physrevb.41.9032; http://www.ncbi.nlm.nih.gov/pubmed/9993246; https://link.aps.org/doi/10.1103/PhysRevB.41.9032; http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.41.9032/fulltext; http://link.aps.org/article/10.1103/PhysRevB.41.9032
American Physical Society (APS)
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