DocumentCode :
979312
Title :
On the temperature and frequency dependence of the surface resistance of superconducting Nb
Author :
Philipp, A. ; Halbritter, J.
Author_Institution :
Kernforschungszentrum Karlsruhe, IK, Fed. Rep. of Germany
Volume :
17
Issue :
1
fYear :
1981
fDate :
1/1/1981 12:00:00 AM
Firstpage :
951
Lastpage :
954
Abstract :
Surface resistances R(T,f)of superconducting Nb show Δ-values well below the bulk value and a frequency dependence deviating from homogeneous Nb. So, surface resistances in various modes between 12 and 18 GHz have been measured for the first time. As results, Δ/kTc is increasing from 1.83 to 1.87 with frequency, and 
has been fitted to the data. This with 
improving agreement with what is anticipated from the BCS theory of homogeneous Nb can either be explained by rf induced superconductivity or by h.f being larger than the smearing of the density of states by weak superconducting spots.
has been fitted to the data. This with improving agreement with what is anticipated from the BCS theory of homogeneous Nb can either be explained by rf induced superconductivity or by h.f being larger than the smearing of the density of states by weak superconducting spots.Keywords :
Superconducting materials; Surfaces; Chemicals; Electrical resistance measurement; Frequency dependence; Frequency measurement; Loss measurement; Niobium; Superconductivity; Surface resistance; Surface treatment; Temperature dependence;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.1981.1061031
Filename :
1061031
Link To Document :
