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| Title: | Azimuthal dependence of switching field strength for nematic liquid crystal bistability on patterned alignment layers |
| Authors: | Niitsuma, Jun-ichi
Yoneya, Makoto
Yokoyama, Hiroshi |
| Keywords: | liquid crystal
bistability
coherent rotation model |
| Issue Date: | 2012-05-17 |
| Publisher: | American Institute of Physics |
| Magazine name: | Journal of Applied Physics |
| Volume: | 111 |
| Number: | 10 |
| Start page: | 103507-1 |
| End page: | 103507-6 |
| DOI: | 10.1063/1.4716681 |
| Abstract: | We investigate the azimuthal dependence of the switching field strength for nematic liquid crystalbistability on patterned alignment layers to determine the validity of a switching theory proposedby Kim et al. [Appl. Phys. Lett. 78, 3055 (2001)] and to evaluate higher-order azimuthal anchoringcoefficients. Director behavior during switching is described in detail for general azimuthaldirections of an applied electric field and the experimental results are explained on the basis of thetheory. We obtain azimuthal anchoring coefficients up to the second higher-order term in anexpansion of the anchoring energy function. Detailed analysis of the director behavior reveals aclose analogy between the proposed model of nematic liquid crystal bistability and a coherentrotation (Stoner-Wohlfarth) model of ferromagnetism. This suggests a reversal-asymmetricproperty of the substrate-nematic interface director, differing from the reversal symmetry of thebulk nematic director, as far as the nematic bistability switching is concerned. |
| Rights: | Copyright 2012 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Jun-ichi Niitsuma, Makoto Yoneya, and Hiroshi Yokoyama, Journal of Applied Physics, 111(10), 103507 (2012) and may be found at http://dx.doi.org/10.1063/1.4716681 |
| URI: | http://hdl.handle.net/10119/10613 |
| Material Type: | publisher |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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