Magneto–optical effect of TEB30A liquid crystal doped with thulium oxides

doi:10.1088/1674-1056/23/4/044216

Abstract The influences of an external magnetic field on the optical properties of the TEB30A nematic liquid crystal doped with thulium oxides (Gd₂O₃, Dy₂O₃, Nd₂O₃, Y₂O₃, and Sm₂O₃) are studied. It is shown that a magnetic field applied parallelly to the sample cell surface leads to the rotational orientation of mesogenes. All samples except for the sample doped with Sm₂O₃ nanoparticles undergo structural deformations. The behavior of the TEB30A/Sm₂O₃ differs from those of the TEB30A liquid crystal doped with other four nanoparticles. The presence of Sm₂O₃ nanoparticles in the TEB30A liquid crystal does not cause the structural deformation of the liquid crystal matrix. At the same time, the anchoring type of the liquid crystal molecules on the nanoparticle surface is different. The director n is parallel to the magnetic moment μ in the TEB30A/Sm₂O₃, and inclined to the magnetic moment μ in the TEB30A/Nd₂O₃, and perpendicular to the magnetic moment μ in each of TEB30A/Gd₂O₃, TEB30A/Dy₂O₃, and TEB30A/Y₂O₃. Besides, the dependence of the structural deformation on the critical magnetic field for the TEB30A is obtained.

Keywords: magnetic field TEB30A nematic liquid crystal thulium oxides

Received: 08 November 2013
Revised: 23 December 2013
Accepted manuscript online:

PACS:

42.70.Df

(Liquid crystals)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 50862007), the Natural Science Foundation of Inner Mongolia Autonomous Region, China (Grant No. 20080404MS0114), and the Inner Mongolia Autonomous Region Scientific Research Fund, China (Grant No. NJZY12203).

Corresponding Authors: Liu Gui-Xiang
E-mail: gxliuemail@126.com

About author: 42.70.DF

Cite this article:

Liu Gui-Xiang (刘桂香), Jin Xiang (金香) Magneto–optical effect of TEB30A liquid crystal doped with thulium oxides 2014 Chin. Phys. B 23 044216

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Magneto–optical effect of TEB30A liquid crystal doped with thulium oxides

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