Title :
Bulk superconductivity above 20 K in Nb3Ge
Author :
Newkirk, L.R. ; Valencia, F.A. ; Giorgi, A.L. ; Szklarz, E.G. ; Wallace, T.C.
Author_Institution :
Los Alamos Scientific Laboratory, Los Alamos, New Mexico
fDate :
3/1/1975 12:00:00 AM
Abstract :
The superconducting properties of bulk films(0.02- 0.06 mm thick) of Nb3Ge deposited on Cu substrates by chemical vapor deposition have been studied along with physical parameters characterizing these deposits. Results of susceptibility measurements showing superconducting onsets greater than 21 K and resistivity measurements showing onset greater than 22 K are presented along with heat capacity measurements. Data are also presented defining a relationship between superconducting transition temperature and lattice spacing throughout the range of 4 - 21 K. In addition, the effects of substrate temperature and substrate material, as well as mechanical properties such as substrate adherence are described.
Keywords :
Superconducting materials; Chemical vapor deposition; Conductivity measurement; Lattices; Mechanical factors; Niobium; Superconducting films; Superconducting materials; Superconducting transition temperature; Superconductivity; Temperature distribution;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.1975.1058637
