Effect of thermally activated dynamics on electron spin-lattice relaxation in glasses (CROSBI ID 173678)
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Merunka, Dalibor ; Kveder, Marina ; Rakvin, Boris
engleski
Effect of thermally activated dynamics on electron spin-lattice relaxation in glasses
Thermally activated dynamics of double-well systems is reexamined as a possible mechanism of electron spin-lattice relaxation (SLR) of paramagnetic centers in glasses. Using the soft- potential model, we have found that this mechanism can explain a nearly quadratic temperature dependence of the SLR rate in various amorphous materials over the temperature range 1-100 K. This mechanism is expected to be operative over this temperature range, as opposed to the phonon- induced tunneling of two-level systems, which is usually considered as the mechanism responsible for this behavior.
amorphous materials; electron paramagnetic resonance; glassy modes; soft potential model
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