摘要
文章介绍了Na0 .3 CoO2 ·1.3H2 O新型层状超导体的合成、超导电性及晶体结构等研究的新进展 .结构分析表明 ,这种超导体的晶格具有六方对称性 ,其空间对称群为P6 3 /mmc.电子显微镜观察清楚地显示 ,沿c轴方向超导材料呈现层状结构特征 ,并发现在Co-O面上存在一个超结构 .由电子能量损失谱分析得知 ,Co离子在Na0 .3CoO2 ·1.3H2 O超导体中的价态范围为 +3.6— +3.8.
The synthesis, superconductivity and structural properties of Na 0.3 CoO 2·1.3H 2O superconductors have been investigated. Analysis demonstrates that the basic crystal structure of this superconducting phase has a hexagonal cell with the P6 3/mmc space group symmetry. Electron microscopy observations reveal a prominent layer feature along the c \|direction and a new superstructure within the CoO 2 layers. Electron energy loss spectrometry analyses show that the Co ions have valence states of around +3.7 in this superconducting materials.
出处
《物理》
CAS
北大核心
2003年第10期687-689,共3页
Physics
基金
国家杰出青年基金 (批准号 :10 2 2 5 415 )
