Magnetoelastic effects in Ni(2)Mn(1+x)Ga(1-x) alloys from first-principles calculations
文献类型：期刊论文
| 作者 | Q. M. Hu ; C. M. Li ; S. E. Kulkova ; R. Yang ; B. Johansson ; L. Vitos |
| 刊名 | Physical Review B
 |
| 出版日期 | 2010 |
| 卷号 | 81期号:6 |
| 关键词 | shape-memory alloys electronic-structure martensitic phase potential model heusler alloys ni2mnga transformation approximation strain |
| ISSN号 | 1098-0121 |
| 中文摘要 | The magnetic coupling between Mn atoms on Ga sublattice (Mn(Ga)) and Mn atoms on Mn sublattice (Mn(Mn)) in Ni(2)Mn(1+x)Ga(1-x) alloy and its effect on the elastic modulus of the alloy are investigated by the use of first-principles methods. It is shown that, for x = 0.25, the state with antiparallel Mn(Ga)-Mn(Mn) magnetic coupling is slightly more stable than that with parallel coupling, whereas for x = 0.10, both magnetic states are almost degenerated. For both antiparallel and parallel Mn(Ga)-Mn(Mn) magnetic couplings, the bulk modulus (B) of Ni(2)Mn(1+x)Ga(1-x) deviates from the general e/a-B relationship with e/a being the number of valence electrons per atom. The shear modulus C' versus the martensitic transformation temperature T(M) for Ni(2)Mn(1+x)Ga(1-x) with antiparallel Mn(Ga)-Mn(Mn) magnetic coupling is in line with the general C'-T(M) relationship for Ni(2)MnGa-based alloys, in contrast to the case of parallel Mn(Ga)-Mn(Mn) magnetic coupling. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/31160]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Q. M. Hu,C. M. Li,S. E. Kulkova,et al. Magnetoelastic effects in Ni(2)Mn(1+x)Ga(1-x) alloys from first-principles calculations[J]. Physical Review B,2010,81(6). |
| APA | Q. M. Hu,C. M. Li,S. E. Kulkova,R. Yang,B. Johansson,&L. Vitos.(2010).Magnetoelastic effects in Ni(2)Mn(1+x)Ga(1-x) alloys from first-principles calculations.Physical Review B,81(6). |
| MLA | Q. M. Hu,et al."Magnetoelastic effects in Ni(2)Mn(1+x)Ga(1-x) alloys from first-principles calculations".Physical Review B 81.6(2010). |
入库方式： OAI收割
来源：金属研究所
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