Study of spin-lattice relaxation rates in solids: Lattice frame method compared with quantum density-matrix method, and Glauber dynamic.

摘要

The spin-lattice relaxation rates are calculated for a rigid magnetic spin cluster in an elastic medium in the presence of a magnetic field using the lattice-frame method. This rate is then compared with both the rate calculated using the quantum mechanical density-matrix method and with the Glauber dynamics. These calculation results are used in the contribution of various heat baths, such as a phonon bath in various dimensions or a fermionic bath, to transition rates that enter into dynamic Monte Carlo simulations of molecular magnets and nanomagnets.