Abstract
We study, by Monte Carlo simulation, the spin lattice relaxation rate 1/(ω,T) caused by diffusing ions in disordered structures. We show that both disorder and Coulomb interactions are essential to obtain the typical non-Bloembergen-Purcell-Pound behavior of 1/. The dependence of 1/ upon frequency ω and temperature T can be described by the simple scaling form 1/=f(ωτ). We find that the NMR correlation time τ is more highly activated than the conductivity relaxation time , which is in agreement with very recent experimental results.
- Received 9 April 1993
DOI:https://doi.org/10.1103/PhysRevLett.71.573
©1993 American Physical Society