The influence of magnetic field on refractive index profile of ferronematic cell
Silesian University of Technology, Institute of Physics, 2 Krzywoustego Str., 44-100 Gliwice, Poland
2 Military University of Technology, Institute of Applied Physics, 2 Kaliskiego Str., 00-908 Warsaw, Poland
This paper presents the study of the influence of magnetic field on the refractive index profile of homeotropically oriented 6CHBT-based ferronematic liquid crystal cell. The direction of magnetic field was chosen in a way which ensures the one-dimensional deformation of directors field. The FN cell was placed between polarizers. On a basis of Burylov-Raikher model and measurements of light transmission throughout the ferronematic layer the mean volume concentration of magnetic particles dispersed in 6CHBT and refractive index profiles induced by magnetic filed were determined. Moreover the range of magnetic field intensity was determined in which the distribution of tilt angle can be described in a scope of the Burylov-Raikher theory and the small tilt angle approximation.
© EDP Sciences, Springer-Verlag, 2008