Anomalous Hydrodynamic Behaviors of Smectic Liquid Crystals at Low Frequencies
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概要
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We report the details of the measurements of the layer compression modulus B and the longitudinal viscosity η^^〜 of several thermotropic smectic phases in the frequency range from 10 Hz to 1 kHz. We confirmed for smectic phases having liquidlike layers (including smectic-A, smectic-C and chiral smectic-C phases) that η^^〜 has an anomalous frequency (ω) dependence of the type κ^^〜/ω predicted theoretically by Mazenko, Ramaswamy and Toner, and also by Katz and Lebedev. The temperature dependence of B and the strength of the anomalous viscosity κ^^〜 were measured in detail, which revealed, in particular, that a close correlation exists between κ^^〜 and B. We also found that, under an applied magnetic field, which tends to suppress the thermal fluctuations of smectic layers, κ^^〜 decreases whereas B increases, a result which is consistent with the premise of the advocated theories.
- 社団法人応用物理学会の論文
- 1991-04-15
著者
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OKANO Koji
Department of Applied Physics, Faculty of Engineering, The University of Tokyo
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Okano Koji
Department Of Applied Phisic Faculty Of Engineering The University Of Tokyo
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Yamamoto Jun
Department Of Anesthesiology Sapporo Medical University School Of Medicine
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Yamamoto Jun
Department Of Applied Physics Faculty Of Engineering The University Of Tokyo
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