Robust highly-spin-polarized ferromagnetism in hexagonal CrGa(7)N(8) and MnGa(7)N(8)
文献类型：期刊论文
| 作者 | Zhu, LF ; Liu, BG |
| 刊名 | JOURNAL OF PHYSICS D-APPLIED PHYSICS
 |
| 出版日期 | 2008 |
| 卷号 | 41期号:21 |
| 关键词 | HALF-METALLIC FERROMAGNETISM MOLECULAR-BEAM-EPITAXY TEMPERATURE FERROMAGNETISM MAGNETIC-PROPERTIES DOPED GAN MN FILMS ZNO SEMICONDUCTORS GAMNN |
| ISSN号 | 0022-3727 |
| 通讯作者 | Zhu, LF (reprint author), Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Motivated by high-temperature ferromagnetism in transition-metal doped gallium nitrides, we study 12.5% transition-metal-substituted wurtzite GaN, XGa(7)N(8) (X = Cr, Mn, Fe, Co, Ni), using a full-potential density-functional method. Our calculated results show that CrGa(7)N(8) is a metallic ferromagnet and MnGa(7)N(8) is a typical half-metallic ferromagnet with a large half-metallic gap of 0.75 eV. They both have high spin polarization at the Fermi levels, 96.8% for CrGa(7)N(8) and 99.9% for MnGa(7)N(8) with spin - orbit coupling taken into account. Their ferromagnetism is very robust against the corresponding antiferromagnetic fluctuations and is attributed to the right positions of the d levels and the large spin exchange splitting driven by strong p - d hybridization. Antiferromagnetic orders are shown to be favourable in the cases of Fe, Co and Ni because their d levels are much lower in energy than that of both Cr and Mn and the majority-spin parts of them are merged in the valence bands of wurtzite GaN. The two highly-spin-polarized ferromagnetic phases should play some important roles in the ferromagnetism in GaN-based diluted magnetic semiconductors and could be realized in future high-quality samples. |
| 收录类别 | SCI |
| 资助信息 | Nature Science Foundation of China [10774180, 90406010, 60621091]; National Key Projects of Basic Research [2005CB623602]; Chinese Academy of Sciences [KJCX2.YW.W09-5] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/52205]  |
| 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 | Zhu, LF,Liu, BG. Robust highly-spin-polarized ferromagnetism in hexagonal CrGa(7)N(8) and MnGa(7)N(8)[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2008,41(21). |
| APA | Zhu, LF,&Liu, BG.(2008).Robust highly-spin-polarized ferromagnetism in hexagonal CrGa(7)N(8) and MnGa(7)N(8).JOURNAL OF PHYSICS D-APPLIED PHYSICS,41(21). |
| MLA | Zhu, LF,et al."Robust highly-spin-polarized ferromagnetism in hexagonal CrGa(7)N(8) and MnGa(7)N(8)".JOURNAL OF PHYSICS D-APPLIED PHYSICS 41.21(2008). |
入库方式： OAI收割
来源：物理研究所
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