Structure and properties of Tb2Pd2Mg hydride
| Autor: | Ladislav Havela, I. Halevy, Khrystyna Miliyanchuk, Lev Akselrud, Silvie Mašková, Mauro Giovannini |
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| Rok vydání: | 2017 |
| Předmět: |
Materials Chemistry2506 Metals and Alloys
Materials science Magnetism 02 engineering and technology Crystal structure 010402 general chemistry 01 natural sciences Tetragonal crystal system Materials Chemistry Antiferromagnetism Condensed matter physics Hydride Mechanical Engineering Hydrogen absorption Mechanics of Materials 2506 Metals and Alloys 021001 nanoscience & nanotechnology 0104 chemical sciences Pearson symbol Crystallography Remanence Absorption (chemistry) 0210 nano-technology |
| Zdroj: | Journal of Alloys and Compounds. 694:201-207 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.09.294 |
| Popis: | Hydrogen exposure of Tb2Pd2Mg crystallizing in the tetragonal Mo2FeB2 structure results in the absorption 8 ± 1 H/f.u. The absorption is not reversible and leads to a structure transition yielding a new structure type (Pearson symbol oI40, space group Fmmm). Tb2Pd2Mg is an antiferromagnet with TN ≈ 60 K showing 2 metamagnetic transitions. Upon hydrogenation the susceptibility cusp related to AF ordering disappears and the susceptibility increases monotonously with decreasing temperature. Magnetic remanence, which starts to develop below 20–25 K, can be attributed to a randomness in H sites occupancy. |
| Databáze: | OpenAIRE |
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