Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Journal of Applied Physics
66 (1989), S. 5514-5517
ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Low-resistivity contacts to bulk high Tc superconductors have been prepared by resistive evaporation with values of ρs(Ω cm2) as low as 10−10 (77 K) for Ag/YBaCuO, 10−9 (77 K) for Ag/TlPbBaCaCuO, and 10−7 (60 K) for Ag/BiCaSrCuO. ρs has been found to be improved by increasing the length of a preevaporation step. This effect has been further investigated by secondary ion-mass spectrometry analysis on several Ag/Si samples. Both three-terminal and four-terminal methods have been used to determine ρs; the three-terminal method shows less dependency on the sample/contact geometry for measurements taken above Tc.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.343704
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