Dynamical Behavior of a Nematic Liquid Crystal just above the Nematic-Isotropic Transition from Spin-Lattice Relaxation

摘要: We report here the proton spin-lattice relaxation time ${({T}_{1})}_{\mathrm{CF}}$ measured in $p$-methoxybenzylidene $p\ensuremath{-}n$ butylaniline at two frequencies a temperature range of about 25\ifmmode^\circ\else\textdegree\fi{}C just above nematic-isotropic transition. have determined correlation for critical fluctuations, ${\ensuremath{\tau}}_{\mathrm{CF}}$, using simple extension Bloembergen-Purcell-Pound theory which relates ${\ensuremath{\tau}}_{\mathrm{CF}}$ and ${({T}_{1})}_{\mathrm{CF}}$. The dependence is good agreement with de Gennes experimental results Stinson Litster.