Nuclear spin-lattice relaxation in a Kondo superconductor

✍ Scribed by Kazuyuki Matsoi; Yoshika Masuda

• Publisher: Springer US
• Year: 1978
• Tongue: English
• Weight: 622 KB
• Volume: 31
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00116232

✦ Synopsis

The nuclear spin-lattice relaxation rate Rs in a Kondo superconductor has been calculated numerically in the framework of the Miiller-Hartmann-Zittartz depairing theory. The calculations have been performed in the case of the usual Korringa mechanism for certain concentrations of magnetic impurities and some typical values of TK/Tco, where Tr is the Kondo temperature and Too is the superconducting transition temperature in the absence of magnetic impurities. The temperature variation of Rs shows very interesting behavior for values of TK/T~0 corresponding to the reentrance behavior of superconductivity. Results are compared with the experimental data on the La(Ce)Al2 system obtained by MacLaughlin, Alloul, and Daugherty. Other possible relaxation mechanisms in the La(Gd, Ce)Al2 systems are also discussed.