$^{23}$Na NMR Study of Layered Superconductor $Na_xCoO_2- yH_2O$

Details $^{23}$Na NMR Study of Layered Superconductor $Na_xCoO_2- yH_2O$ $^{23}$Na NMR Study of Layered Superconductor $Na_xCoO_2- yH_2O$

2005-07-04

arxiv.org/abs/cond-mat/0507081v2

Physics

Condensed Matter

Superconductivity

2 pages with 2 figures, submitted to Physica B (SCES '05)

Scientific paper

10.1016/j.physb.2006.01.317

We measured $^{23}$Na-NMR spectra and nuclear spin-lattice relaxation rates $^{23}(1/T_1)$ of superconducting and non-superconducting bilayer hydrate $Na_xCoO_2-yH_2O$ (x ~ 0.3, y ~ 1.3). The central resonance frequency shows a small but various shift due to the difference in the shielding effect by intercalated $H_2O$ molecules. The different shielding effect also gives a large difference in the magnitude of $^{23}(1/T_1)$.

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