A dynamic disorder model is developed to describe the random changes of a local structure due to the environment rearrangements. The picture incorporates in a simple way both ''local'' and ''cooperative'' features of the structural relaxation. If applied to the spin relaxation of a two-level system, the model accounts for the crossover between the homogeneous and the heterogeneous relaxation which is usually found in disordered systems. A good agreement with recent NMR results on the rotational dynamics in supercooled fluids is found.
Spin relaxation driven by dynamic disorder
LEPORINI, DINO;
1996-01-01
Abstract
A dynamic disorder model is developed to describe the random changes of a local structure due to the environment rearrangements. The picture incorporates in a simple way both ''local'' and ''cooperative'' features of the structural relaxation. If applied to the spin relaxation of a two-level system, the model accounts for the crossover between the homogeneous and the heterogeneous relaxation which is usually found in disordered systems. A good agreement with recent NMR results on the rotational dynamics in supercooled fluids is found.File in questo prodotto:
Non ci sono file associati a questo prodotto.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
