Magnetic properties of Sm3Fe28.1-xCoxMo0.9 (x=0,4,8,12,14,16) compounds
文献类型：期刊论文
| 作者 | Li, WX ; Guo, JG ; Liu, BD ; Shen, J ; Wu, GH ; Chen, NX ; Yang, FM |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2004 |
| 卷号 | 69期号:17 |
| 关键词 | SITE PREFERENCE INTERATOMIC POTENTIALS CURIE TEMPERATURES PHASE-STABILITY TI)29NY NITRIDE EXCHANGE ATOMS MN SM DIFFRACTION |
| ISSN号 | 1098-0121 |
| 通讯作者 | Li, WX: Chinese Acad Sci, Inst Phys, State Key Lab Magnetism, POB 603-18, Beijing 100080, Peoples R China. |
| 中文摘要 | A series of Sm3Fe28.1-xCoxMo0.9 compounds (x=0,4,8,12,14,16) have been synthesized and their magnetic properties and structures investigated by means of x-ray diffraction and magnetic measurements. It is found that substitution of Co for Fe leads to a significant increase of the Curie temperature and saturation magnetization. Even more important, for xgreater than or equal to14 the easy magnetization direction changes from easy plane to easy axis. In this compound system, Sm3Fe12.1Co16Mo0.9 is a very promising candidate for rare-earth permanent magnetic materials. Its room temperature saturation magnetization (mu(0)M(s)=1.50 T) and anisotropy field (B-a=6.5 T) are comparable to those of Nd2Fe14B (mu(0)M(s)=1.60 T and B-a=7.0 T). However, its Curie temperature is 1020 K, which is substantially higher than that of Nd2Fe14B (T-C=588 K). The lattice inversion method has been employed to calculate the site occupancies of Mo and Co in the quaternary 3:29 type Sm3Fe28-xCoxMo compounds (x=0, 4, 8, 12, 16). The results show that Co preferentially occupies Fe1, Fe8, and Fe11 sites, whereas Mo occupies Fe3, Fe2, and Fe6 sites. As Co atoms preferentially occupy Fe1, Fe8, and Fe11 sites, the negative exchange interactions of Fe-Fe pairs associated with the sites are modified into positive and strong interactions of Fe-Co or Co-Co, which leads to the rise of Curie temperature. The bond lengths between various atoms obtained by computer simulation are used to calculate the Curie temperatures of Sm3Fe29-xMox (x=0 and 1). The calculated Curie temperature of Sm3Fe28Mo is close to the experimental value. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2013-09-18 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/41386]  |
| 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 | Li, WX,Guo, JG,Liu, BD,et al. Magnetic properties of Sm3Fe28.1-xCoxMo0.9 (x=0,4,8,12,14,16) compounds[J]. PHYSICAL REVIEW B,2004,69(17). |
| APA | Li, WX.,Guo, JG.,Liu, BD.,Shen, J.,Wu, GH.,...&Yang, FM.(2004).Magnetic properties of Sm3Fe28.1-xCoxMo0.9 (x=0,4,8,12,14,16) compounds.PHYSICAL REVIEW B,69(17). |
| MLA | Li, WX,et al."Magnetic properties of Sm3Fe28.1-xCoxMo0.9 (x=0,4,8,12,14,16) compounds".PHYSICAL REVIEW B 69.17(2004). |
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来源：物理研究所
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