Electron Spin Resonance of a Localized Moment in the Superconducting State: BRu2:Gd(B=La,Ce,Th).

摘要

The Electron Spin Resonance spectrum of Gd in the Type II cubic-superconductors LaRu2, CeRu2and ThRu2has been observed in both the normal and superconducting regimes. Upon transition from the normal to the superconducting state,the spectra exhibit (a) a change in line shape (A/B ratio), (b) an increase in thermal broadening immediately below Tc(H),and (c) a change in g value. Comparison with experiments performed by others,as well as a preliminary interpretation of the data,are presented. (Author)