Variation of T/sub c/ of sputtered Nb/sub 3/Ge

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

OSTI ID:7367641

Ghosh, A K; Pendrys, L; Douglass, D H

Alloy samples of Nb and Ge were prepared by simultaneous rf sputtering of composite Nb--Ge targets onto heated alumina substrates. Variation of the superconducting transition temperature T/sub c/ and the x-ray properties of these specimens were studied as a function of the alloy composition, in the neighborhood of Nb/sub 3/Ge. Variation of the sputtering parameters, i.e., the self bias voltage, sputtering gas pressure, and substrate temperature was also studied. Results indicate that high T/sub c/ occur for well-ordered stochiometric Nb/sub 3/Ge alloys. It was also found that the competing tetragonal phases are promoted by the highly energetic atoms, i.e., at high sputtering rates. The relative sticking probability of Ge is important at the higher substrate temperatures. (auth)

• Research Organization: Univ. of Rochester, NY
• NSA Number: NSA-33-17700
• OSTI ID: 7367641
• 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
360104 -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
GERMANIUM ALLOYS
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
PHYSICAL PROPERTIES
SPUTTERING
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE