Fabrication and Josephson properties of Nb/sub 3/Ge

Conference · Sat Mar 01 04:00:00 EDT 1975 · IEEE Trans. Magn.; (United States)

OSTI ID:7367609

Laibowitz, R B ^[1]; Tsuei, C C; Cuomo, J C; Ziegler, J F; Hatzakis, M

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1. IBM Zurich Lab.

Sputtering techniques were used to fabricate Nb/sub 3/Ge films on amorphous substrates which exhibit superconductivity up to about 21/sup 0/K. Of the many sputtering parameters that can be varied, the most important appear to be target geometry, target composition, and substrate temperature. Initial results of composition analysis indicate that a Ge-rich phase nucleates during the initial stages of the deposition. Josephson microbridges were fabricated from these films, and microwave-induced steps in the I-V curves were observed in micron-sized bridges. An interpretation of the criticality of the bridge size in terms of a vortex state is given. (auth)

• NSA Number: NSA-33-17130
• OSTI ID: 7367609
• Conference Information: Journal Name: IEEE Trans. Magn.; (United States) Journal Volume: MAG-11:2
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
CHEMICAL COMPOSITION
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
FABRICATION
FILMS
GEOMETRY
GERMANIUM ALLOYS
INTERMETALLIC COMPOUNDS
JOSEPHSON EFFECT
MATHEMATICS
MICROWAVE RADIATION
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PHYSICAL PROPERTIES
RADIATIONS
SPUTTERING
SUBSTRATES
SUPERCONDUCTING FILMS
TARGETS
TEMPERATURE DEPENDENCE