NMR in High Tc Oxide Superconductors
Since the discovery of the high Tc oxide superconductor1), many experimental and theoretical efforts have been made to elucidate the mechanism for the occurrence of the superconductivity. In these systems the important problem is to investigate which atomic sites are responsible for the superconductivity. NMR measurement which provides information on the electronic state at each atomic site is a suitable tool for this study. Measurements of nuclear spin-lattice relaxation time T1 have been performed on Cu sites at CuO2 plane and CuO chain2)3)4)5) and on Y site6). Recently we have prepared the 17O substituted YBa2Cu3O7 and measured T1 of 17O.7)
KeywordsVortex Anisotropy Coherence
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