Measured frequency dependence of the surface resistance of superconducting niobium

1974 ◽  
Vol 45 (11) ◽  
pp. 5023-5026 ◽  
Author(s):  
W. Bauer ◽  
S. Giordano ◽  
H. Hahn
Keyword(s):  
Frequency Dependence ◽  
Surface Resistance ◽  
Measured Frequency

scholarly journals Frequency dependence of the microwave surface resistance of MgB2 by coaxial cavity resonator

2014 ◽  
Vol 503 ◽  
pp. 150-153
Author(s):  
A. Agliolo Gallitto ◽  
P. Camarda ◽  
M. Li Vigni ◽  
A. Figini Albisetti ◽  
G. Giunchi
Keyword(s):  
Frequency Dependence ◽  
Surface Resistance ◽  
Cavity Resonator ◽  
Microwave Surface Resistance ◽  
Coaxial Cavity

Erratum: Frequency dependence of surface resistance of bulk high temperature superconductor

1990 ◽  
Vol 26 (21) ◽  
pp. 1832 ◽  
Author(s):  
P.A. Smith ◽  
L.E. Davis ◽  
N.McN. Alford ◽  
T.W. Button
Keyword(s):  
High Temperature ◽  
Frequency Dependence ◽  
Surface Resistance ◽  
High Temperature Superconductor

Erratum: Frequency dependence of surface resistance of bulk high temperature superconductor

1990 ◽  
Vol 26 (20) ◽  
pp. 1738
Author(s):  
P.A. Smith ◽  
L.E. Davis ◽  
N. Mcn. Alford ◽  
T.W. Button
Keyword(s):  
High Temperature ◽  
Frequency Dependence ◽  
Surface Resistance ◽  
High Temperature Superconductor

Temperature and Frequency Dependence of the Surface Resistance in the Vortex State of Type-II Superconductors

1970 ◽  
Vol 2 (7) ◽  
pp. 2817-2818 ◽  
Author(s):  
Gaston Fischer ◽  
R. D. McConnell ◽  
P. Monceau ◽  
Kazumi Maki
Keyword(s):  
Frequency Dependence ◽  
Surface Resistance ◽  
Vortex State ◽  
Type Ii ◽  
Type Ii Superconductors

Frequenzabhängigkeit der Protonenrelaxation in Lösungen organischer Radikale

1965 ◽  
Vol 20 (1) ◽  
pp. 91-94 ◽  
Author(s):  
K. H. Hausser ◽  
G. J. Krüger ◽  
F. Noack
Keyword(s):  
Free Radicals ◽  
Frequency Dependence ◽  
Diffusion Constant ◽  
Translational Diffusion ◽  
Magnetic Interactions ◽  
Correlation Times ◽  
First Approximation ◽  
Measured Frequency

The correlation times, τ, of the magnetic interactions in solutions of organic free radicals are determined by measuring the frequncy dependence of the relaxation of the protons of the solvent. The measured frequency dependence agrees well with theoretical expectations based on a model of translational diffusion. It depends on the diffusion constant of the solvent and on the temperature, but is independent, to first approximation, of the type and concentration of the dissolved radical.

The surface resistance of normal and superconducting tin at 36 kMc/s

1955 ◽  
Vol 232 (1191) ◽  
pp. 519-537 ◽  
Keyword(s):  
Frequency Dependence ◽  
Single Crystals ◽  
Surface Resistance ◽  
Surface Effect ◽  
Fluid Model ◽  
Surface Conductance ◽  
Scaling Factors ◽  
Ellipsoidal Model ◽  
Observed Behaviour ◽  
Two Fluid Model

A new calorimetric method has been developed to measure the surface resistance of plane single crystals of tin at 36 kMc/s. The normal resistance depends upon the orientations of the tetrad and dyad axes relative to the surface of the specimen and the direction of current flow in the surface, the form of the anisotropy being in good agreement with Pippard’s results for cylindrical single crystals of tin at 9·4 kMc/s. The frequency-dependence of the resistance differs somewhat from that expected for a metal under extreme anomalous conditions, and similar discrepancies are found when the results for specimens of copper and aluminium are compared with earlier work on these metals. Electron micrographs of the electropolished surfaces of the tin specimens show that the anisotropy of the resistance is not merely a surface effect, hence justifying its interpretation as a property of the bulk metal. A simple ellipsoidal model, which constitutes a convenient picture of a surface having certain geometrical characteristics in common with the actual Fermi surface of tin, is found to reproduce the principal features of the anisotropy. The temperature variation of the superconducting resistance may be described by the empirical functions used by Pippard to reduce his results, the shapes of the corresponding curves over certain ranges of temperature for different specimens at the two frequencies being similar, apart from orientation-dependent and frequency-dependent scaling factors. For specimens of different orientations the scaling factors are found to be proportional to each other and to the surface conductance in the normal state, and their ratio is independent of frequency. These results and the form of the frequency-dependence of the superconducting resistance confirm Pippard’s conclusion that the observed behaviour at high frequencies is difficult to reconcile with a 'two-parameter two-fluid’ model of a superconductor.

Frequency dependence of microwave surface resistance of YBCO superconducting ceramics

1989 ◽  
Vol 162-164 ◽  
pp. 1551-1552 ◽  
Author(s):  
J.P. Ganne ◽  
R. Kormann ◽  
M. Labeyrie ◽  
F. Lainee ◽  
B. Lloret
Keyword(s):  
Frequency Dependence ◽  
Surface Resistance ◽  
Microwave Surface Resistance ◽  
Superconducting Ceramics
Sign in / Sign up

Export Citation Format

Share Document