Low‐resistance noble metal contacts to high‐temperature superconductors
作者:
R. Selim,
R. Caton,
A. M. Buoncristiani,
C. E. Byvik,
R. A. Edahl,
S. Wise,
期刊:
Journal of Applied Physics
(AIP Available online 1990)
卷期:
Volume 67,
issue 1
页码: 376-378
ISSN:0021-8979
年代: 1990
DOI:10.1063/1.345265
出版商: AIP
数据来源: AIP
摘要:
We have extended our studies of a melting technique for making low‐resistance contacts to high‐temperature superconductors. We have made contacts to both YBa2Cu3O7−xand Bi2BaSr2Cu2O8, and to related superconducting compounds by melting gold or silver pads onto the samples before the final oxygen treatment. Scanning electron microscope studies show that both gold and silver do not diffuse far from the contact area. The surface contact resistivity of the best contacts made by the melting technique has an upper limit value in the 10−8&OHgr; cm2range at 77 K. This contact resistivity shows no significant change in its value over a period of 17 months. Furthermore, an electron radiation dose of 5.7×1017electron/cm2only doubled the contact resistivity. This method of making low‐resistance contacts to high‐Tcmaterials can be integrated into the final oxygen treatment of many prospective superconducting elements or devices.
点击下载:
PDF
(410KB)
返 回