|
This article is cited in 2 scientific papers (total in 2 papers)
CONDENSED MATTER
New features of a smectic-$A$-crystal-$B$ phase transition in a homologous series of liquid crystals
E. M. Aver'yanov L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk
Abstract:
The components $L_j$ of the Lorentz tensor and the polarizability density of molecules $G$ in the smectic-$A$ and crystalline-B phases have been determined for homologues of the series of alkyl-p-(4-alkoxybenzylideneamino-)cinnamates. The quantity $L_j$ ($G$) in both phases is a linear (quadratic) function of the orientational order parameter of molecules $S$, which is invariant (noninvariant) with respect to the $A-B$ transition, which is manifested in the form of jumps $\delta L_j$ and $\delta G$ and enhancement of the $G(S)$ dependence. An increase in the length of terminal molecular chains and weakening of interlayer correlation of molecules are accompanied by strengthening of the $A-B$ transition of the first order and $G(S)$ dependences in both phases together with an increase in $\delta L_j$ and $\delta G$. Change $\delta G$ and dependence $G(S)$ in the $B$ phase are related to change in the conformation (flattening) of aromatic molecular cores.
Received: 09.01.2014
Citation:
E. M. Aver'yanov, “New features of a smectic-$A$-crystal-$B$ phase transition in a homologous series of liquid crystals”, Pis'ma v Zh. Èksper. Teoret. Fiz., 99:3 (2014), 179–184; JETP Letters, 99:3 (2014), 158–163
Linking options:
https://www.mathnet.ru/eng/jetpl3655 https://www.mathnet.ru/eng/jetpl/v99/i3/p179
|
Statistics & downloads: |
Abstract page: | 134 | Full-text PDF : | 35 | References: | 44 | First page: | 16 |
|