Distorted icosahedral Ni5Nb3Zr5 clusters in the as-quenched and hydrogenated amorphous (Ni0.6Nb 0.4)0.65Zr0.35 alloys

M. Matsuura; M. Fukuhara; K. Konno; T. Fujita; M. W. Chen; N. Fujima; A. Inoue

doi:10.1016/j.jnoncrysol.2011.05.026

Distorted icosahedral Ni₅Nb₃Zr₅ clusters in the as-quenched and hydrogenated amorphous (Ni_0.6Nb _0.4)_0.65Zr_0.35 alloys

M. Matsuura, M. Fukuhara, K. Konno, T. Fujita, M. W. Chen, N. Fujima, A. Inoue

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Local structures of the hydrogenated (Ni_0.6Nb _0.4)_1-xZr_x (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 (Ni_0.6Nb_0.4)_0.65Zr_0.35 and hydrogenated [(Ni_0.6Nb_0.4)_0.65Zr _0.35]_0.922H_0.078 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 (Ni_0.6Nb _0.4)_0.65Zr_0.35 and the [(Ni _0.6Nb_0.4)_0.65Zr_0.35] _0.922H_0.078 amorphous alloys. This distorted icosahedral Ni₅Nb₃Zr₅ cluster can be associated with the occurrence of the singular electronic transport behaviors of the hydrogenated (Ni_0.6Nb_0.4)_0.65Zr_0.35 alloy.

Original language	English
Pages (from-to)	3357-3360
Number of pages	4
Journal	Journal of Non-Crystalline Solids
Volume	357
Issue number	18
DOIs	https://doi.org/10.1016/j.jnoncrysol.2011.05.026
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

Access to Document

10.1016/j.jnoncrysol.2011.05.026

Cite this

@article{30f8ad1e8485441d8fe721dff854b913,

title = "Distorted icosahedral Ni5Nb3Zr5 clusters in the as-quenched and hydrogenated amorphous (Ni0.6Nb 0.4)0.65Zr0.35 alloys",

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.",

keywords = "Amorphous, EXAFS, Hydrogen, NiNbZr, XAFS",

author = "M. Matsuura and M. Fukuhara and K. Konno and T. Fujita and Chen, {M. W.} and N. Fujima and A. Inoue",

year = "2011",

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doi = "10.1016/j.jnoncrysol.2011.05.026",

language = "English",

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pages = "3357--3360",

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T1 - Distorted icosahedral Ni5Nb3Zr5 clusters in the as-quenched and hydrogenated amorphous (Ni0.6Nb 0.4)0.65Zr0.35 alloys

AU - Matsuura, M.

AU - Fukuhara, M.

AU - Konno, K.

AU - Fujita, T.

AU - Chen, M. W.

AU - Fujima, N.

AU - Inoue, A.

PY - 2011/9/15

Y1 - 2011/9/15

N2 - 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.

AB - 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.

KW - Amorphous

KW - EXAFS

KW - Hydrogen

KW - NiNbZr

KW - XAFS

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