Nuclear-magnetic resonance relaxation in glassy Cu As S and Cu As Se

bstract Nuclear magnetic resonance (NMR) of Cu 63 and nuclear quadrupole resonance (NQR) of As 75 have been used to study relaxation effects and the possibility of local atomic diffusion in the Cu-As-S and Cu-As-Se glassy systems. The frequency and temperature dependences of the spin-lattice and spin-spin relaxation times have been measured. The NMR spin-lattice relaxation measurements for Cu 63 in the Cu-As-Se and Cu-As-S glassy systems suggest that the spin-lattice relaxation rate T 1− 1 is probably dominated by two ...