IS THE SPLITTING OF THE SUPERCONDUCTING TRANSITION IN YBA2CU3O7-X (X-LESS-THAN-0.05) DUE TO OXYGEN-DIFFUSION LIMITATIONS

被引：20

作者：

CONDER, K ^{[1
]}

KRUGER, C ^{[1
]}

KALDIS, E ^{[1
]}

ZECH, D ^{[1
]}

KELLER, H ^{[1
]}

机构：

[1] UNIV ZURICH,INST PHYS,CH-8006 ZURICH,SWITZERLAND

来源：

PHYSICA C | 1994年 / 225卷 / 1-2期

关键词：

D O I：

10.1016/0921-4534(94)90319-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The oxygen self-diffusion coefficient in the strongly anisotropic process of the isotope exchange of chain sites in YBa2Cu3O7-x (x<0.02) has been measured. The chemical diffusion coefficient was estimated for the process of the oxidation of the nearly stoichiometric 123. It is shown that the oxygen-diffusion rate is large enough to assure a homogeneous oxygen distribution after annealing at about 320-degrees-C, 200-300 h in oxygen. Therefore, the splitting of the superconducting transition in 123 cannot be explained by the oxygen inhomogeneity in the grains of this material.

引用

页码：13 / 20

页数：8

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