Fabrication and properties of all a-axis oriented YBaCuO-PrBaCuO-YBaCuO Josephson junctions
Book
·
OSTI ID:64684
- LETI-CEA Technologies Avancees, Grenoble (France)
YBaCuO-PrBaCuO-YBaCuO a-axis oriented trilayer structures was realized by in-situ ICM (Inverted Cylindrical Magnetron) sputtering method, including a template step. Cross type junctions of micrometer size were patterned with a trilayer SNOP process. Their Josephson and Umeling characteristics have been investigated for various thicknesses of the PrBaCuO barrier (10--100 nm). The critical current was found proportional to exp(-{alpha}T{sup 1/2}) (SNS type in the dirty limit) where {alpha} was a constant. Strong and reproducible non-linearities were observed on the I-V curves especially above 10 mV and analyzed in terms of tunneling process. Tunnel barrier and interface models are proposed to explain the low critical current-normal resistance products (0.4 mV at 4.2K) as well as the I-V curves.
- OSTI ID:
- 64684
- Report Number(s):
- CONF-940142--; ISBN 0-8194-1455-7
- Country of Publication:
- United States
- Language:
- English
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