Analysis of the Knight shift data on Li and Zn substituted YBa2Cu3O6+x

作者：Bulut N^*

来源：Physica C-Superconductivity and Its Applications, 2001, 363(4): 260-284.

DOI：10.1016/S0921-4534(01)00755-9

• Knight shift
• nonmagnetic impurities
• antiferromagnetic correlations
• YBa2Cu3O6+x

The Knight shift data on Li and Zn substituted YBa2Cu3O6+x are analyzed using an itinerant model with short-range antiferromagnetic correlations. The model parameters, which are determined by fitting the experimental data on the transverse nuclear relaxation rate T-2(-1) of pure YBa2Cu3O6+x, are used to calculate the Knight shifts for various nuclei around a nonmagnetic impurity located in the CuO2 planes. The calculations are carried out for Li and Zn impurities substituted into optimally doped and underdoped YBa2Cu3O6+x. The results are compared with the Li-7 and Y-89 Knight shift measurements on these materials.

• 出版日期2001-12-1