Nuclear Magnetic Relaxation Induced by the Dynamics of Lattice Defects in Solids (7 = 3/2,I=2, and I= 5/2)

Abstract

Abstract Results are presented for the relaxation of the nuclear magnetization via quadrupolar inter-actions caused by the dynamics of point-like lattice defects in cubic solids. For systems with nuclear spins I = 3/2, several aspects of the lineshape function of the absorption signal are con-sidered. The treatment includes the transition to the rigid lattice case, the presence of additional static quadrupolar interactions as well as the dynamic shift of the absorption, and saturation effects. For spins I = 2, expressions are given in detail for the parameters governing the relaxa-tion of the longitudinal and the transverse magnetization. For the I = 5/2 case, numerical results are presented for the same quantities accounting for complete and incomplete excitation of the spin system.