Magnetic Properties of Liquid Crystals
Magnetic Properties of Liquid Crystals
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液晶的磁性
DOI：
10.1063/1.1659047
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发表时间：
1970
影响因子：
3.2
通讯作者：
P. Pincus
中科院分区：
文献类型：
--
作者：
P. Pincus
液晶的特征是组成液晶的棒状(或可能是盘状)分子的取向顺序。分子抗磁化率的各向异性部分导致了外加磁场和取向结构之间的耦合。根据Frank弹性理论，我们讨论了静电场的几种这样的效应，例如胆甾相螺旋的解旋，Freedericksz相变。本文的第二部分讨论了将磁共振作为研究液晶中序参数和取向涨落模式的工具。
Liquid crystals are characterized by an orientational order of the rod‐like (or possible disk‐like) molecules of which they are composed. The anisotropic part of the molecular diamagnetic susceptibility gives rise to a coupling between external magnetic fields and the orientational structure. In terms of the Frank elasticity theory we discuss several such effects of a static field, e.g. unwinding of a cholesteric helix, Freedericksz transition. The second part of this review is devoted to a consideration of magnetic resonance as a tool to study both the order parameter and the orientational fluctuation modes in a liquid crystal.