23Na NMR Studies of Non-superconducting and Superconducting Na0.35CoO2-1.3H2O (Tc < 1.8 and ~ 4.5 K)
| dc.creator | Ohta, H. | |
| dc.creator | Itoh, Y. | |
| dc.creator | Michioka, C. | |
| dc.creator | Yoshimura, K. | |
| dc.date | 2005-08-08 | |
| dc.date.accessioned | 2026-07-07T03:06:14Z | |
| dc.date.available | 2026-07-07T03:06:14Z | |
| dc.description | We report 23Na NMR studies of the polycrystalline samples of bilayer hydrated cobalt oxides Na0.35CoO2-1.3H2O with the superconducting transition temperatures Tc < 1.8 and ~ 4.5 K. The magnitude of the 23Na nuclear spin-lattice relaxation rate 23(1/T1) significantly decreased from non-hydrated Na0.7CoO2 to the bilayer hydrates. We found that the temperature dependence of 23(1/T1) of the non-superconducting bilayer hydrate is similar to that of the non-hydrated Na0.7CoO2, the spin dynamics of which is understood by A-type (intra-layer ferromagnetic and inter-layer antiferromagnetic) spin fluctuations. The superconducting phase is located close to the A-type magnetic instability. | |
| dc.description | 4 pages, 6 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0508197 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0508197 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/26735 | |
| dc.subject | Superconductivity | |
| dc.title | 23Na NMR Studies of Non-superconducting and Superconducting Na0.35CoO2-1.3H2O (Tc < 1.8 and ~ 4.5 K) | |
| dc.type | text |