A method to determine the surface anchoring energy of a nematic liquid crystal is proposed. The technique implies the measurements of optical retardation of a nematic cell as a function of a strength and direction of the applied magnetic field. It enables one to get both pretilt angle α and anchoring coefficient W a in the course of the same experiment. As an example, both parameters (α=10.9° and W a =1.5×10−5 J/m2) are measured at the interface between the nematic 5CB and rubbed polyimide film.
Applied Physics Letters
Copyright 1995 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 Appl. Phys. Lett. 67, 214 (1995) and may be found at http://dx.doi.org/10.1063/1.114671.
Subacius, Darius; Pergamenshchik, V. M.; Lavrentovich, Oleg (1995). Measurement of Polar Anchoring Coefficient for Nematic Cell with High Pretilt Angle. Applied Physics Letters 67(2) 214-216. doi: 10.1063/1.114671. Retrieved from https://oaks.kent.edu/cpippubs/189