| Title | Hydrogen absorption and field-dependent diamagnetism of SmNiAl |
| Authors | Wang, Yuntao Shao, Huaiyu Li, Yan Xie, Lei Li, Xingguo Takahashi, Seiki |
| Affiliation | Peking Univ, State Key Lab Rare Earth Mat Chem & Applicat, Beijing 100871, Peoples R China. Iwate Univ, Fac Engn, Dept Mat Sci & Engn, Morioka, Iwate 0208551, Japan. |
| Keywords | rare earth intermetallic phase hydrogen absorption magnetic properties INDUCED AMORPHOUS-ALLOYS C15 LAVES COMPOUNDS INTERMETALLIC COMPOUNDS INDUCED AMORPHIZATION MAGNETIC-PROPERTIES THERMAL-STABILITY HYDRIDES METAL DESORPTION BEHAVIOR |
| Issue Date | 2007 |
| Publisher | 磁学和磁性材料杂志 |
| Citation | JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS.2007,311,(2),535-544. |
| Abstract | Hydrogen absorption properties of SmNiAl were systematically investigated between room temperature and 673 K over the pressure range from 0 to 10 MPa. It absorbs hydrogen without clear plateaus, forms hydride SmNiAlHx (x = 0.75-2.04) without structural change below 623 K and decomposes into SmH2 and NiAl at higher temperatures. Then, the magnetic curves, the field-cooled (FC) and the zero-field-cooled (ZFC) susceptibilities of SmNiAl and its hydride were investigated. SmNiAl behaves as paramagnetic above 65 K, but has three antiferromagnetic transitions at lower temperatures. Hydrogenation enhances its magnetism, but weakens the interaction between magnetic moments. In the FC process, hydrogenation especially induces an anomalous diamagnetism. Mechanisms for the hydrogen absorption, structural change and magnetism were discussed. (C) 2006 Elsevier B.V. All rights reserved. |
| URI | http://hdl.handle.net/20.500.11897/251851 |
| ISSN | 0304-8853 |
| DOI | 10.1016/j.jmmm.2006.08.011 |
| Indexed | SCI(E) EI |
| Appears in Collections: | 稀土材料化学与应用国家重点实验室 |
