Transport properties in a superconducting proximity sandwich with magnetic impurities

✍ Scribed by Natsuki Mori

• Publisher: Springer US
• Year: 1980
• Tongue: English
• Weight: 396 KB
• Volume: 40
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00117119

✦ Synopsis

The thermal conductivity and ultrasonic attenuation rate are calculated numerically in a superconducting proximity sandwich containing magnetic impurities on the normal-metal side. The calculations are carried out on the basis of the theory given by Machida, in which the McMillan tunneling model is adopted to describe the proximity effect. In the limit of a thick superconducting film, analytical expressions are obtained near the transition temperature T = Tc and near T = O. As in the case of a bulk superconductor with magnetic impurities, the existence of a bound state within an effective energy gap gives a significant effect on the transport properties. The calculation is compared with experiment on the thermal conductivity for AgMn/Pb sandwiches, and reasonable agreement is obtained between them.