The Order Parameters of Some Nematic Liquid Crystals Measured by the Resonance Raman Effect and Its Relevance to the Nematic-Isotropic Phase Transition

Shunsuke Kobinata Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Midori-ku, Yokohama, 227, Japan

Yuko Nakajima Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Midori-ku, Yokohama, 227, Japan

Hiroshi Yoshida Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Midori-ku, Yokohama, 227, Japan

Shiro Maeda Research Laboratory of Resources Utilization, Tokyo Institute of Technology, Midori-ku, Yokohama, 227, Japan

Abstract

The second and fourth order parameters of nematic MBBA and 5CB have been determined near the nematic-isotropic transition temperatures by means of resonance Raman measurements on β-carotene dissolved as an orientational probe. The limiting behaviour of the second order parameter of MBBA near the transition point has been investigated on the basis of its fluctuation, which is deduced from the 2nd and 4th order parameter values.

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The Order Parameters of Some Nematic Liquid Crystals Measured by the Resonance Raman Effect and Its Relevance to the Nematic-Isotropic Phase Transition

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The Order Parameters of Some Nematic Liquid Crystals Measured by the Resonance Raman Effect and Its Relevance to the Nematic-Isotropic Phase Transition

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