Cu-63 NQR and Cd-113 NMR studies of YbMCu4(M = In, Cd)

Cu-63 NQR and Cd-113 NMR in YbInCu4 and YbCdCu4 have been measured on powde red samples prepared from single crystals. In YbInCu4 the Cu-63 NQR results are almost in agreement with the previous ones for polycrystalline samples . In YbCdCu4 the nuclear relaxation rate T-1(-1) for Cu-63 NQR suggests a g radual change of f electron states from Fermi liquid to localized one with temperature. The Knight shift and T-1(-1) for Cd-113 NMR show remarkable ma gnetic field dependences. (C) 2000 Elsevier Science B.V. All rights reserve d.