Polymorphic magnetization and local ferromagnetic structure in Co-doped Mn2NiGa alloys
文献类型：期刊论文
| 作者 | Ma, L ; Wang, WH ; Zhen, CM ; Hou, DL ; Tang, XD ; Liu, EK ; Wu, GH |
| 刊名 | PHYSICAL REVIEW B
 |
| 出版日期 | 2011 |
| 卷号 | 84期号:22 |
| 关键词 | HALF-METALLIC FERRIMAGNETISM HEUSLER ALLOYS HYPERFINE FIELDS TRANSFORMATION TRANSITION SEARCH MN2VAL |
| ISSN号 | 1098-0121 |
| 通讯作者 | Ma, L (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China. |
| 中文摘要 | Polymorphic magnetization behavior has been observed experimentally in the Heusler alloy Mn2NiGa in which Co has been substituted for Ni or Ga. The magnetization of the austenitic phase can be enhanced up to 132 emu/g, when more than 50% of the antiferromagnetic couplings between Mn atoms are changed to ferromagnetic couplings at the largest composition tolerance for Co substituting for Ga. The effects of the exchange interaction have been investigated based on the corresponding atomic configuration generated by the occupation selectivity of the doped Co atoms. First-principles calculations indicate that a high level of d-electron hybridization can occur when Mn atoms are the nearest neighbors of a Co atom. This causes a strong ferromagnetic exchange interaction in specific atomic configurations and produces a local ferromagnetic structure in the native ferrimagnetic structure matrix. It has been indicated that, based on theoretical work of Stearns, the interatomic distance plays a critical role in producing the local ferromagnetic structure. This has also been used to explain the magnetization behavior through the martensitic transformation in Mn2NiCoGa alloys. |
| 收录类别 | SCI |
| 资助信息 | National Natural Science Foundation of China [51031004, 51021061]; National Basic Research Program of China (973 Program) [2009CB929501] |
| 语种 | 英语 |
| 公开日期 | 2013-09-24 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/51144]  |
| 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 | Ma, L,Wang, WH,Zhen, CM,et al. Polymorphic magnetization and local ferromagnetic structure in Co-doped Mn2NiGa alloys[J]. PHYSICAL REVIEW B,2011,84(22). |
| APA | Ma, L.,Wang, WH.,Zhen, CM.,Hou, DL.,Tang, XD.,...&Wu, GH.(2011).Polymorphic magnetization and local ferromagnetic structure in Co-doped Mn2NiGa alloys.PHYSICAL REVIEW B,84(22). |
| MLA | Ma, L,et al."Polymorphic magnetization and local ferromagnetic structure in Co-doped Mn2NiGa alloys".PHYSICAL REVIEW B 84.22(2011). |
入库方式： OAI收割
来源：物理研究所
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