Magnetic phase diagram of layered cobalt dioxide LixCoO2 |
| |
Authors: | Mukai K Ikedo Y Nozaki H Sugiyama J Nishiyama K Andreica D Amato A Russo P L Ansaldo E J Brewer J H Chow K H Ariyoshi K Ohzuku T |
| |
Institution: | Toyota Central Research and Development Labs Inc, Nagakute, Aichi, Japan. |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|