DIELECTRIC AND ELECTRO-OPTICAL EFFECTS IN NEMATIC LIQUID CRYSTALS

dc.contributor.advisorGleeson, James
dc.contributor.authorAlmatani, Bdoor
dc.date.accessioned2023-10-02T10:14:11Z
dc.date.available2023-10-02T10:14:11Z
dc.date.issued2023-08-02
dc.description.abstractThe present work studied the physical properties of a nematic LC material compound RT11165. The recently discovered ferroelectric nematic phase that carries a non-zero dipole moment exhibits in this material. Experimentally we used the Fréedericksz transition method in the nematic phase by measuring the light intensity through a planar nematic layer as a function of the amplitude and frequency of an applied voltage. The threshold voltage shows dependence on the frequency. In addition, the dielectric anisotropy and the splay elastic constant K11 are measured. The dielectric anisotropy indicates critical behavior at high frequencies relatively low as cooling toward the NF phase, while at low frequencies, it shows strong positive dielectric permittivity. Also, the dielectric spectroscopy shows two molecular relaxation modes detected at low frequency and temperature in the perpendicular component of the dielectric permittivity, and the strength of the relaxation frequency was found to be decreased. In contrast, it increases rapidly and smoothly in the parallel component.
dc.format.extent64
dc.identifier.citationAPA
dc.identifier.urihttps://hdl.handle.net/20.500.14154/69306
dc.language.isoen
dc.publisherSaudi Digital Library
dc.subjectliquid crystals
dc.titleDIELECTRIC AND ELECTRO-OPTICAL EFFECTS IN NEMATIC LIQUID CRYSTALS
dc.typeThesis
sdl.degree.departmentScience
sdl.degree.disciplinePhysics
sdl.degree.grantorKent State University
sdl.degree.nameMaster of Physics

Files

Copyright owned by the Saudi Digital Library (SDL) © 2025