NMR study of filled skutterudite superconductors

Abstract: We report on the results of the 195Pt NMR measurements for to clarify the microscopic electronic states at low temperatures. In and , the isotropic component of the Knight shift, that is, the contribution from the Pt states is smaller than that in . In the superconducting state, shows a small coherence peak just below , followed by an exponential decrease at low temperatures revealing on energy gap , which suggests a conventional BCS superconductor. [ABSTRACT FROM AUTHOR]