Residual resistivity and oxygen stoichiometry in Pr2-xCexCuO4+delta single crystals

被引：47

作者：

Brinkmann, M

Rex, T

Stief, M

Bach, H

Westerholt, K

机构：

[1] Inst. Experimentalphysik/F., Ruhr-Universität Bochum

来源：

PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 1996年 / 269卷 / 1-2期

关键词：

electron-doped superconductors; lattice defects; pair-breaking scattering; transport;

D O I：

10.1016/0921-4534(96)00436-4

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Using an improved high-temperature annealing procedure we homogeneously vary the oxygen content of Pr2-xCexCuO4+delta single crystals and change the superconducting transition temperature in small steps. Minute changes of the oxygen concentration delta give rise to a strong increase of the residual resistivity but leave the Hall and the Seebeck coefficient nearly unchanged. A strong correlation of the change of the residual resistivity and the change of T-c suggests that the point-defect scattering rate on oxygen interstitials or oxygen vacancies is an important parameter determining T-c in the electron-doped high-T-c systems.

引用

页码：76 / 82

页数：7

共 39 条

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