Abstract
Local structures of the hydrogenated (Ni0.6Nb 0.4)1-xZrx (x = 0.3-0.4) amorphous alloys attract much attention for the sake of their epoch-making electronic transport behaviors. We investigated the local structures by XAFS for the as-quenched (Ni0.6Nb0.4)0.65Zr0.35 and hydrogenated [(Ni0.6Nb0.4)0.65Zr 0.35]0.922H0.078 amorphous alloys, in which ballistic conductivity has been observed. XAFS results of the Ni K-edge are analyzed based on the structure model deduced by the first principle calculation. The analysis suggests that highly distorted icosahedral Ni 5Nb3Zr5 cluster, which has a centered-Ni and a surrounding Nb triangle, is a main structural unit of (Ni0.6Nb 0.4)0.65Zr0.35 and the [(Ni 0.6Nb0.4)0.65Zr0.35] 0.922H0.078 amorphous alloys. This distorted icosahedral Ni5Nb3Zr5 cluster can be associated with the occurrence of the singular electronic transport behaviors of the hydrogenated (Ni0.6Nb0.4)0.65Zr0.35 alloy.
Original language | English |
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Pages (from-to) | 3357-3360 |
Number of pages | 4 |
Journal | Journal of Non-Crystalline Solids |
Volume | 357 |
Issue number | 18 |
DOIs | |
Publication status | Published - 2011 Sep 15 |
Keywords
- Amorphous
- EXAFS
- Hydrogen
- NiNbZr
- XAFS
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Materials Chemistry