NMR in New BiS$_2$-Layered Superconductor LaO$_{0.5}$F$_{0.5}$BiS$_2$

A new BiS$_2$-layered compound, LaO$_{0.5}$F$_{0.5}$BiS$_2$, was recently discovered to be a superconducting material ($T_c\sim{3}$~K, ambient pressure and $\sim{10}$~K, 2~GPa). We are conducting a Nuclear Magnetic Resonance study ofLaO$_{0.5}$F$_{0.5}$BiS$_2$ to shed light on its superconducting properties as functions of temperature and magnetic field. Our study emphasizes the NMR of $^{19}$F nuclei between the temperatures of 15~K to 2~K. We present spectral parameters and spin-spin $T_2$ relaxation time data which occur above and below the superconducting state. Our data indicate changes of behavior below $T=10$~K in a sample for which $T_c\sim{3}$~K.