Superconductivity phase diagram of NaxCoO2·1.3H2O
✍ Scribed by Schaak, R. E.; Klimczuk, T.; Foo, M. L.; Cava, R. J.
- Book ID
- 109891301
- Publisher
- Nature Publishing Group
- Year
- 2003
- Tongue
- English
- Weight
- 303 KB
- Volume
- 424
- Category
- Article
- ISSN
- 0028-0836
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We synthesized Na x (H 3 O) z CoO 2 AE y 0 H 2 O samples with various Na/H 3 O ratios but with the constant Co valence of s = +3.40, and measured their magnetic properties to draw phase diagrams of the system. The superconductivity is very sensitive to the Na/H 3 O ratio. With varying x under fixed
Superconducting phase diagram of sodium cobalt oxyhydrate was determined. It was proved that the superconductivity is very sensitive to the isovalent ion exchange between the Na + and H 3 O + ions but rather insensitive to the Co valence, suggesting that e 0 g bands play a crucial role in the occurr