G. Koren, J.T.C. Yeh
Journal of Applied Physics
Using the thermal-lens effect, the specific heat Cp and the thermal conductivity Λ have been measured simultaneously in the isotropic phase of the liquid crystal MBBA (p-methoxy benzylidene p-butylanyline) near its isotropic-to-nematic transition. Accurate analysis of the lens dynamical behavior yields both transport coefficients provided the change of the refractive index with temperature, dndT, is known. A precise measurement of n(T) was carried out separately. The best fits yield the critical exponents 0.52 and 0.65 for Cp and Λ, respectively, with a critical temperature Tc equal to Tp-0.21±0.01°C, where Tp is the clearing temperature. The present measurements give the first conclusive results on the critical behavior of Cp in the isotropic phase of a liquid crystal. © 1976 The American Physical Society.
G. Koren, J.T.C. Yeh
Journal of Applied Physics
A. Gupta, G. Koren, et al.
Proceedings of SPIE 1989
G. Koren
Applied Physics Letters
J. Mannhart, R.P. Huebener, et al.
Physica A: Statistical Mechanics and its Applications