Homoepitaxial (110) YBa2Cu3O7-δ/YBa2Cu3O7-δ SNS junctions

被引：7

作者：

Usagawa, T ^{[1
]}

Wen, JG ^{[1
]}

Koyama, S ^{[1
]}

Utagawa, T ^{[1
]}

Tanabe, K ^{[1
]}

机构：

[1] ISTEC, Superconduct Res Lab, Koto Ku, Tokyo 135, Japan

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1999年 / 38卷 / 4B期

关键词：

homoepitaxial SNS junctions; (110) YBCO homoepitaxy; Fe-doped YBCO; ultra smooth surface morphology;

D O I：

10.1143/JJAP.38.L436

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the first successful single crystal SNS junction based on (110) YBa2CU3O7-delta (YBCO)/YBa2(Cu1-xFex)(3)O7-delta, (YBCFeO: 150nm)NBa2Cu3O7-delta films grown on (110) YBCO single crystal substrates. The: surface flatness is nearly the same level as good as (110) YBCO homoepitaxial films, as confirmed by Scanning Electron Microscopy, Reflection High Energy Electron Diffraction and Transmission Electron Microscopy observations. The single crystal SNS junction shows an anisotropic field dependence in large-junction behavior at 77 K. The field supression of critical supercurrent I-c(T) is greater than 95% at 77 K and 9.0 K The temperature dependence of I-c(T) is well described by proximity SNS theory near the junction transition temperature T-cn but exibits nearly T-linear behavior at low temperature.

引用

页码：L436 / L439

页数：4

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