23Na NMR Evidence for Charge Order and Anomalous Magnetism in NaxCoO2
| dc.creator | Mukhamedchine, I. R. | |
| dc.creator | Alloul, H. | |
| dc.creator | Collin, G. | |
| dc.creator | Blanchard, N. | |
| dc.date | 2004-02-03 | |
| dc.date.accessioned | 2026-07-07T02:56:15Z | |
| dc.date.available | 2026-07-07T02:56:15Z | |
| dc.description | We have compared by $^{23}$Na NMR and magnetic susceptibility the magnetic properties of oriented powder samples of Na$_{x}$CoO$_{2}$ compounds. The NMR spectra are found identical for various samples with nominal $0.50\leq x\leq 0.70,$ which establishes that the dominant phase has a single composition $x\approx 0.70$. Three Na sites are identified from their single valued quadrupole effects and magnetic shifts which implies a very definite order of the Na$^{+}$ ions and of the Co charges in the CoO$_{2}$ planes. The local susceptibility of the magnetic cobalt sites displays a large enhancement below 100 K with respect to the usually found high $T$ Curie-Weiss law. A very distinct much weaker Pauli like magnetism is detected for $x\approx 0.35$, the parent of the superconducting hydrated compound. | |
| dc.description | 5 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0402074 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0402074 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/23250 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | 23Na NMR Evidence for Charge Order and Anomalous Magnetism in NaxCoO2 | |
| dc.type | text |