DocumentCode :
970865
Title :
Critical currents in Nb3 Ge based pseudobinaries
Author :
Alterovitz, S. ; Woollam, John A. ; Engelhardt, John J. ; Webb, George W.
Author_Institution :
NASA Lewis Research Center, Cleveland, Ohio, USA
Volume :
15
Issue :
1
fYear :
1979
fDate :
1/1/1979 12:00:00 AM
Firstpage :
512
Lastpage :
515
Abstract :
We have prepared Nb3 Ge, Nb3 Ge1-x Gax and Nb3 Ge1-x Snx on heated alumina substrates using CVD. Midresistive transitions were up to 21K and transition widths were as low as 0.3K. Critical currents were measured to 22 Tesla at temperatures from 4.2K to 19K. Effective upper critical fields B*c2 were measured by extrapolating 
vs B data. Preliminary data show that for small Ga additions, B*c2 increased above the value at x=0. Flux pinning forces vs reduced field b=B/B*c2 do not obey scaling laws, which we explain as being due to inhomogeneous material having a distribution of Tc and Bc2 values.
vs B data. Preliminary data show that for small Ga additions, B*Keywords :
Superconducting materials; Critical current; Current measurement; Flux pinning; Magnetic field measurement; Magnetic fields; NASA; Niobium; Substrates; Superconducting materials; Temperature;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1979.1060255
Filename :
1060255
Link To Document :
