PAC Probes as Diffusion Tracers in Solids

摘要: Perturbed angular correlation (PAC) probe atoms have been used as tracers to study diffusion in solids. The method works for on a sublattice which the point symmetry is noncubic and electric field gradient (EFG) at nucleus reorients each jump. Such motion leads relaxation of nuclear quadrupole interaction. Precise values tracer jump frequency obtained from fits measured PAC perturbation functions. Results date are reviewed Cd rare-earth indides such LaIn3 that L12 crystal structure, In-sublattice EFG by 90-. New results presented LaSn3 prospects future studies outlined.