63Cu spin lattice relaxation in CuMn: nuclear spin diffusion
63Cu spin lattice relaxation in CuMn: nuclear spin diffusion
复制标题
63Cu CuMn 中的自旋晶格弛豫：核自旋扩散
DOI：
10.1088/0305-4608/3/4/029
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发表时间：
1973
期刊：
影响因子：
--
通讯作者：
H. Alloul
中科院分区：
文献类型：
--
作者：
P. Bernier;H. Alloul
The recovery of the 63Cu nuclear magnetization in dilute CuMn alloys has been studied over wide ranges of field and temperature (1<H<51 kG, 0.32<T<77 K). Depending on the experimental conditions exp-(t/T1) or exp-(t/ tau )1/2 behaviours, characteristic respectively of rapid diffusion and diffusionless regimes, have been observed. In intermediate cases the analysis of the shape of the recovery allows a quantitative determination of the diffusion barrier b. The number nb of nuclear sites within b depends linearly on the impurity magnetization. All the results can be explained by simple models. The diffusion barrier, which has been ignored until now in dilute alloys, is shown to play a large role in the interpretation of the relaxation data in such systems.
