Magnetic Relaxation in an Exactly Soluble Model
J. A. TjonInstitute for Theoretical Physics, State University of New York, Stony Brook, New York 11790
1970en
ABI
Abstract
Some nonequilibrium properties of an impurity in a linear chain of spins with nearest-neighbor interaction of the isotropic $X\ensuremath{-}Y$ type are studied. It is shown that under certain conditions its behavior is in agreement with the general principles of statistical mechanics. The relaxation in the presence of a transverse field is also studied, and it is found that in the weak coupling region the approach to equilibrium is described by a sum of exponentials. However, the results do not agree with the solution of the Bloch equations.
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Cited by 40 references