Transport properties of antiferromagnetic superconductors

✍ Scribed by Hongguang Chi; A. D. S. Nagi

• Publisher: Springer US
• Year: 1992
• Tongue: English
• Weight: 893 KB
• Volume: 86
• Category: Article
• ISSN: 0022-2291
• DOI: 10.1007/bf00121983

✦ Synopsis

Transport properties of antiferromagnetic superconductors with TN < Tc have been investigated. Detailed numerical results are given for SmRh4B4 by using the following model. The paramagnetic phase (TN < T < To) is described by using Abrikosov-Gorkov theory of magnetic ions in an ordinary superconductor. In the ,4F phase (T <TN), the effects of the molecular field HQ(T ) and the elastic scattering of conduction electrons from spin fluctuations are included. Expressions for HQ(T) and the scattering rate from spin fluctuations have been derived. The aim has been to see if properties are enhanced or depressed by the AF ordering occurring below TN. It is found that whereas the electronic thermal conductivity Ks, nuclear spin relaxation rate Rs, and the longitudinal ultrasonic attenuation as, are depressed by the AF ordering, the inverse of the magnetic penetration depth, [~,(T) ] -|, is enhanced below TN. The effect of all types of impurities is included in the study. Theoretical results for Ks and [3.(T) ]-1 agree with the experimental values for SmRh4B4 (experimental data for other properties are not available in literature). In the above, TN is the Nbel temperature and Tc is superconducting transition temperature.