MU-SR MAGNETIC RESPONSE OF CENISN ON IMPURITY CONTENT

Recent results of thermodynamic and transport measurements on CeNiSn a t low temperatures show a strong dependence on sample purity. A lower impurity content leads to a more metallic behavior of CeNiSn. We prese nt muon spin relaxation (mu SR) spectra at T < 1K for two samples of C eNiSn which show quite different behavior in low temperature specific heat. No significant difference could be detected in decisive mu SR pa rameters for the two specimen. This strengthens the view that mu SR pr obes the intrinsic magnetic properties of the heavy fermion ground sta te of CeNiSn.