| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1517842 | Journal of Physics and Chemistry of Solids | 2007 | 4 Pages |
Abstract
We found two components of the in-plane Co59 NMR Knight shift K and different nuclear spin–lattice relaxation rates 1/T11/T1 in bilayer hydrated superconductor NaxCoO2·yH2ONaxCoO2·yH2O, an oriented powder sample by a magnetic field in Fluorinert FC70. Distinguishable two peaks in the central transition line of the Co59 NMR spectrum at 10 K can be explained by an anisotropic Knight shift in a triangular plane. The hyperfine coupling constants seem to change around 150 K, in which the bulk susceptibility χχ shows a broad minimum, suggesting a change of the electronic state in the CoO2CoO2 plane.
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Authors
C. Michioka, Y. Itoh, H. Ohta, M. Kato, K. Yoshimura,