Microwave Surface Resistance of Type II Superconductors in the Vortex State.
Rept. for Dec 70-Jan 72,
AEROSPACE CORP EL SEGUNDO CALIF LAB OPERATIONS
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The authors have measured the microwave surface resistance of various Nb-Ta and Pb-In superconducting alloys using a derivative technique to determine its rate of change with field near HC2. Previous dc measurements of this slope have generally been interpreted to show agreement with the Caroli-Maki theory, which Thompson has found to be incomplete. The measurements show a region of constant slope somewhat below HC2 with a magnitude in agreement with the dc results but also show that the slope increases rapidly to approach the Thompson values in the limit H approaches HC2. Theoretical arguments are presented indicating why the two theories can have different regions of validity. Author
- Electricity and Magnetism
- Solid State Physics