Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal
文献类型：期刊论文
| 作者 | Gao, SP ; Zhang, WH ; Li, JM ; Zhu, J |
| 刊名 | SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY
 |
| 出版日期 | 2001 |
| 卷号 | 44期号:12页码:1602 |
| 关键词 | SHELL PHOTOABSORPTION PROCESSES NEAR-THRESHOLD STRUCTURES INNER EXCITATION STATES |
| ISSN号 | 1006-9283 |
| 通讯作者 | Gao, SP: Tsing Hua Univ, Electron Microscopy Lab, Sch Mat Sci & Engn, Beijing 100084, Peoples R China. |
| 中文摘要 | The phase relations at the 600 degreesC and 700 degreesC isothermal sections of the ternary systems R-Co-B for R Nd, Pr and R = Sm, Cd respectively were summarized in this paper. For Rm+nCo5m+3nB2n, two new types of compounds R3Co13B2 ( R = Pr, Nd, Sm, Gd, Dy, Ho, Er, Y) (m = 2, n = 1) and R5Co19B6 (R = Pr, Nd) (m = 2, n = 3) were synthesized by utilizing the principle of structural combination. Their crystal* structures and easy magnetization direction were determined by X-ray powder diffraction, and structures were refined by the Rietveld method. The Curie temperature T-C, saturation magnetization M-s and anisotropic field H-A of the new compounds were measured using a vibrating-sample magnetometer, an extraction sample magnetometer and M(H) - H curves of samples in different magnetization directions respectively. The T-C and M-s of Rm+nCo5m+3nB2n increase with increasing values of m at a given n value. H-A increases with an increase in n when m is kept invariable. The effects of the substitution of Ni for Co on the magnetic properties of Nd13Co15-xNixB2 were also investigated. It was found that T-SR decreased monotonously as the concentration of Ni increased, and at x = 3 the easy magnetization direction becomes axial at room temperature. The relations between crystal structure and magnetic properties of Rm+nCo5m+3nB2n and the possible routes of synthesizing permanent magnetic materials are also discussed. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/34753]  |
| 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 | Gao, SP,Zhang, WH,Li, JM,et al. Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal[J]. SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,2001,44(12):1602. |
| APA | Gao, SP,Zhang, WH,Li, JM,&Zhu, J.(2001).Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal.SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,44(12),1602. |
| MLA | Gao, SP,et al."Cluster model calculation of N near K-edge energy-loss fine structures in hexagonal GaN crystal".SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY 44.12(2001):1602. |
入库方式： OAI收割
来源：物理研究所
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