NUCLEAR-SPIN-LATTICE RELAXATION VIA PARAMAGNETIC IMPURITIES IN SOLIDS WITH ARBITRARY SPACE DIMENSION

被引：39

作者：

FURMAN, GB ^{[1
]}

KUNOFF, EM ^{[1
]}

GOREN, SD ^{[1
]}

PASQUIER, V ^{[1
]}

TINET, D ^{[1
]}

机构：

[1] CRMD,CNRS,UMR 131,ORLEANS,FRANCE

来源：

PHYSICAL REVIEW B | 1995年 / 52卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.52.10182

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We extend the theory of growth of the nuclear magnetization in the presence of paramagnetic impurities and the absence of spin diffusion to the case of solids with arbitrary space dimension D. We show that the rate of growth of the magnetization is proportional to exp (-At-alpha) where t is the time and alpha is a fractional power which depends on the concentration and distribution of the paramagnetic centers and the magnetic nuclei. In the homogeneous distribution, alpha=D/6. In the inhomogeneous distribution, the sample can be regarded as consisting of subsystems packed in the d-dimensional space of the sample, each of which includes a paramagnetic center surrounded by nuclei. This model results in the expression alpha=(D+d)/6. Experimental data are presented for both of these cases.

引用

页码：10182 / 10187

页数：6

共 20 条

[1] SINGLET-GROUND-STATE PARAMAGNETIC CENTERS IN CUO2 LAYERS AS SEEN FROM TM-169 NMR IN TMBA2CU3O6+X SUPERCONDUCTORS [J].