STUDIES OF SUPERCONDUCTIVITY.
Rept. no. 4 (Final), 1 Jul 68-30 Jun 69,
RUTGERS - THE STATE UNIV NEW BRUNSWICK N J DEPT OF PHYSICS
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A narrative account is given of the achievements which include 1 Studies of the proximity effect between indium alloy films and manganese films using thermal conductivity measurements. These have demonstrated the existence of gapless behavior down to the lowest temperatures. Assuming the existence of low-lying excitations in the neighborhood of the superconductor-manganese interface qualitatively accounts for the data. 2 Measurements of the surface reactance of lead films in proximity with a gadolinium film. The data for both the dependence of transition temperature on thickness and for the temperature dependence of the imaginary part of the conductivity are in good agreement with calculations based on the Ginzburg-Landau equations and on microscopic theory. 3 Studies of the effect of a transverse magnetic field on fluctuations in the conductivity of lead films above Tc. It was demonstrated that the extra conductivity in a magnetic field is a universal function of reduced temperature divided by field. In zero field and particularly at high temperatures there is more conductivity than predicted by the Aslamazov-Larkin theory. Author
- Electricity and Magnetism
- Solid State Physics