Effect of thermally activated dynamics on electron spin-lattice relaxation in glasses

► We study mechanisms of spin-lattice relaxation of paramagnetic centers in glasses. ► Mechanism of thermally activated dynamics of double-well systems is reexamined. ► We use soft-potential model to find temperature dependence of relaxation rate. ► Predicted dependence is similar with those measured in various amorphous materials. ► This mechanism can explain excess of relaxation rate in glassy ethanol.