CU-63 NMR INVESTIGATION OF HGBA2CA2CU3O8+DELTA

Cu-63 NMR measurements have been carried out in HgBa2Ca2Cu3O8+delta (H g1223) with the highest transition temperature, T-c = 133 K, to date. The narrow NMR spectrum and the small residual density of states (DOS) , N-res, at the Fermi level in the superconducting state indicate that the Hg1223 possesses good quality.