| Autor: |
Mukai K; Toyota Central Research and Development Labs Inc, Nagakute, Aichi, Japan., Ikedo Y, Nozaki H, Sugiyama J, Nishiyama K, Andreica D, Amato A, Russo PL, Ansaldo EJ, Brewer JH, Chow KH, Ariyoshi K, Ohzuku T |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2007 Aug 24; Vol. 99 (8), pp. 087601. Date of Electronic Publication: 2007 Aug 22. |
| DOI: |
10.1103/PhysRevLett.99.087601 |
| Abstrakt: |
The magnetism of LixCoO2 (LCO), which has a similar structure to NaxCoO2 (NCO), has been investigated by muon-spin spectroscopy and susceptibility measurements using samples with x=0.1-1 prepared by an electrochemical reaction. In the x range below 0.75, LCO was found to be Pauli paramagnetic down to 1.8 K, suggesting an intermediate- or weak-coupling regime, although disordered local moments, with volume fractions below approximately 20%, appear at low T for LCO with x > or = 0.5. The phase diagram and interactions of LCO are thus strikingly different from NCO, while the differences cannot be explained simply by structural differences between the two systems. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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