SPIN-LATTICE RELAXATION - NON-BLOEMBERGEN-PURCELL-POUND BEHAVIOR BY STRUCTURAL DISORDER AND COULOMB INTERACTIONS

被引：89

作者：

MEYER, M

MAASS, P

BUNDE, A

机构：

[1] I. Institut für Theoretische Physik, Universität Hamburg, D-2000 Hamburg 36

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.71.573

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study, by Monte Carlo simulation, the spin lattice relaxation rate 1/T1(omega,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/T1. The dependence of 1/T1 upon frequency omega and temperature T can be described by the simple scaling form 1/T1 = omega-1 f(omegatau). We find that the NMR correlation time tau is more highly activated than the conductivity relaxation time tau(sigma), which is in agreement with very recent experimental results.

引用

页码：573 / 576

页数：4

共 39 条

[1]

ABRAGAM A, 1962, PRINCIPLES NUCLEAR M

[2] DYNAMIC PROCESSES IN IONIC GLASSES [J].