Abstract
1H NMR spectra and magnetization have been measured for a nanostructured Mg2Ni-H system. 1H MAS NMR spectra indicate the presence of four phases; α-Mg2NiHx, β-Mg2NiH4, α-MgHx and β-MgH2. Most of the hydrogens are contained in the disordered β-Mg2NiH4 phase. Magnetization consists of superparamagnetic and paramagnetic ones. The former has its origin in Ni particles formed during the hydrogenation. The latter is greater than the values of crystalline α-Mg2NiHx and β-Mg2NiH4. 1H NMR line width increases with the decrease in temperature linearly, most of which is of dipolar origin. The hydrogen is more mobile in the disordered β-Mg2NiH4 phase than in the crystalline counterpart.
Original language | English |
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Pages (from-to) | 159-165 |
Number of pages | 7 |
Journal | Journal of Alloys and Compounds |
Volume | 256 |
Issue number | 1-2 |
DOIs | |
Publication status | Published - 1997 Jul 5 |
Externally published | Yes |
Keywords
- Composite material
- H solid-state nmr
- Magnesium nickel hydride
- Magnetization
- Reactive mechanical grinding
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry