Synthesis of the Nb/sub 3/(Al--Ge) system by sputtering

Journal Article · Thu Sep 01 04:00:00 EDT 1977 · J. Low Temp. Phys.; (United States)

DOI:https://doi.org/10.1007/BF00661448· OSTI ID:7298890

Cadieu, F J; Chencinski, N

The variation of the superconducting transition temperature T/sub c/ has been studied in the Nb/sub 3/Al/sub 1-x/Ge/sub x/ system for 0< or =x< or =1 for samples produced by rf sputtering onto heated substrates. The effect that different sputtering gas pressures have upon the rate of energy loss of the sputtered atoms due to collisions with neutral sputtering gas atoms is considered. Also considered is how thermalization can be achieved in the fewest number of collisions by matching the mass of the sputtering gas atoms to that of the sputtered atoms. For the case of Nb/sub 3/(Al--Ge) we show that it is advantageous to use a mixture of sputtering gases so that the light Al atoms can be thermalized as well as the heavier Nb and Ge atoms. It is also thus shown that the same sputtering conditions that are optimal for forming high--T/sub c/ Nb/sub 3/Ge onto heated substrates are not optimal for forming high--T/sub c/ Nb/sub 3/Al.

• Research Organization: Department of Physics, Queens College of CUNY, Flushing, New York
• OSTI ID: 7298890
• Journal Information: J. Low Temp. Phys.; (United States), Journal Name: J. Low Temp. Phys.; (United States) Vol. 28:5; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals &amp; Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
&amp; Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
ALUMINIUM ALLOYS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY LOSSES
FILMS
GERMANIUM ALLOYS
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
SLOWING-DOWN
SPUTTERING
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
THERMALIZATION
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE