Strong electronic correlation in the in-plane electronic properties of the high T-c superconductors
文献类型：期刊论文
| 作者 | Liu, BG |
| 刊名 | JOURNAL OF LOW TEMPERATURE PHYSICS
 |
| 出版日期 | 1996 |
| 卷号 | 105期号:3-4页码:627 |
| 关键词 | HUBBARD-MODEL CHARGE DYNAMICS BAG MECHANISM ANTIFERROMAGNET LA2-XSRXCUO4 FLUCTUATIONS |
| ISSN号 | 0022-2291 |
| 通讯作者 | Liu, BG (reprint author), UNIV BREMEN,INST THEORET PHYS,D-28334 BREMEN,GERMANY. |
| 中文摘要 | The effects of substitution of Si for Co on the crystal structural stability and magnetic properties of NdCo11-xSix compounds have been studied. X-ray diffraction and magnetic measurement show that the single phase region can be expressed as NdCo9.8-9.2Si1.2-1.8 other than NdCo9Si2. X-ray-diffraction study indicates that the compounds adopt the tetragonal BaCd11-type structure. The magnetic properties of a series of NdCo11-xSix solid solutions have been studied by magnetic measurement. Our investigations show that the Curie temperature of NdCo11-xSix increases drastically from 528 K (x=1.8) to 833 K (x=1.2) as the Si content decreases, The Co magnetic moment reaches a maximum between NdCo9.8Si1.2 and NdCo9.6Si1.4, and decreases with the further increase in x. The substitution of Si for Co in NdCo11-xSix leads to a contraction of lattice constant a by 0.2%, c by 0.2%, and a consequent reduction of the unit-cell volume by about 0.6%. The Rietveld refinement results show that the silicon atoms preferentially occupy the 8(d) sites. The occupation of 8(d) sites by proper amount of Si will shift the Fermi level E(F) upward and to a valley with a lower local density of states in NdCo11-xSix compounds, which is favorable for the stability of the BaCd11-type structure. (C) 1996 American Institute of Physics. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/53154]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Liu, BG. Strong electronic correlation in the in-plane electronic properties of the high T-c superconductors[J]. JOURNAL OF LOW TEMPERATURE PHYSICS,1996,105(3-4):627. |
| APA | Liu, BG.(1996).Strong electronic correlation in the in-plane electronic properties of the high T-c superconductors.JOURNAL OF LOW TEMPERATURE PHYSICS,105(3-4),627. |
| MLA | Liu, BG."Strong electronic correlation in the in-plane electronic properties of the high T-c superconductors".JOURNAL OF LOW TEMPERATURE PHYSICS 105.3-4(1996):627. |
入库方式： OAI收割
来源：物理研究所
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