Superconductivity of Ni-Nb-Zr-H glassy alloys with nanoclusters

Mikio Fukuhara; Hajime Yoshida; Keiichi Koyama; Akihisa Inoue; Yoshio Miura

doi:10.1166/jnn.2010.2381

Superconductivity of Ni-Nb-Zr-H glassy alloys with nanoclusters

Mikio Fukuhara, Hajime Yoshida, Keiichi Koyama, Akihisa Inoue, Yoshio Miura

New Industry Creation Hatchery Center (NICHe)

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

5 Citations (Scopus)

Abstract

We investigated the hydrogen effect on superconductivity in the (Ni _0.36Nb _0.24Zr _0.40) _100-xH _x(0 ≤ x ≤ 6.4) glassy alloys with nanoclusters, as a function of temperature. The resistivity of these alloys started to drop from onset temperature of around 9.5 K. The (Ni _0.36Nb _0.24Zr _0.40) _98.6H _1.6 showed zero resistance at 2.1 K. However, the application of a magnetic field >4.6 T arrested the drop of resistivity, showing the existence of superconductivity of type II. The maximum onset temperature of 11.3 K was observed at 4.4 at% H. The superconducting behavior of the glassy alloys would be associated with electron pair transport along zigzag paths, which link the shortened atomic-Ni-Ni-Ni-array in the Zr ₅Ni ₅Nb ₃ clusters, and tunneling among the clusters.

Original language	English
Pages (from-to)	4975-4978
Number of pages	4
Journal	Journal of Nanoscience and Nanotechnology
Volume	10
Issue number	8
DOIs	https://doi.org/10.1166/jnn.2010.2381
Publication status	Published - 2010 Aug 1

Keywords

Glassy alloys
Nanoclusters
Superconductor

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Biomedical Engineering
Materials Science(all)
Condensed Matter Physics

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title = "Superconductivity of Ni-Nb-Zr-H glassy alloys with nanoclusters",

abstract = "We investigated the hydrogen effect on superconductivity in the (Ni 0.36Nb 0.24Zr 0.40) 100-xH x(0 ≤ x ≤ 6.4) glassy alloys with nanoclusters, as a function of temperature. The resistivity of these alloys started to drop from onset temperature of around 9.5 K. The (Ni 0.36Nb 0.24Zr 0.40) 98.6H 1.6 showed zero resistance at 2.1 K. However, the application of a magnetic field >4.6 T arrested the drop of resistivity, showing the existence of superconductivity of type II. The maximum onset temperature of 11.3 K was observed at 4.4 at% H. The superconducting behavior of the glassy alloys would be associated with electron pair transport along zigzag paths, which link the shortened atomic-Ni-Ni-Ni-array in the Zr 5Ni 5Nb 3 clusters, and tunneling among the clusters.",

keywords = "Glassy alloys, Nanoclusters, Superconductor",

author = "Mikio Fukuhara and Hajime Yoshida and Keiichi Koyama and Akihisa Inoue and Yoshio Miura",

year = "2010",

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doi = "10.1166/jnn.2010.2381",

language = "English",

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T1 - Superconductivity of Ni-Nb-Zr-H glassy alloys with nanoclusters

AU - Fukuhara, Mikio

AU - Yoshida, Hajime

AU - Koyama, Keiichi

AU - Inoue, Akihisa

AU - Miura, Yoshio

PY - 2010/8/1

Y1 - 2010/8/1

N2 - We investigated the hydrogen effect on superconductivity in the (Ni 0.36Nb 0.24Zr 0.40) 100-xH x(0 ≤ x ≤ 6.4) glassy alloys with nanoclusters, as a function of temperature. The resistivity of these alloys started to drop from onset temperature of around 9.5 K. The (Ni 0.36Nb 0.24Zr 0.40) 98.6H 1.6 showed zero resistance at 2.1 K. However, the application of a magnetic field >4.6 T arrested the drop of resistivity, showing the existence of superconductivity of type II. The maximum onset temperature of 11.3 K was observed at 4.4 at% H. The superconducting behavior of the glassy alloys would be associated with electron pair transport along zigzag paths, which link the shortened atomic-Ni-Ni-Ni-array in the Zr 5Ni 5Nb 3 clusters, and tunneling among the clusters.

AB - We investigated the hydrogen effect on superconductivity in the (Ni 0.36Nb 0.24Zr 0.40) 100-xH x(0 ≤ x ≤ 6.4) glassy alloys with nanoclusters, as a function of temperature. The resistivity of these alloys started to drop from onset temperature of around 9.5 K. The (Ni 0.36Nb 0.24Zr 0.40) 98.6H 1.6 showed zero resistance at 2.1 K. However, the application of a magnetic field >4.6 T arrested the drop of resistivity, showing the existence of superconductivity of type II. The maximum onset temperature of 11.3 K was observed at 4.4 at% H. The superconducting behavior of the glassy alloys would be associated with electron pair transport along zigzag paths, which link the shortened atomic-Ni-Ni-Ni-array in the Zr 5Ni 5Nb 3 clusters, and tunneling among the clusters.

KW - Glassy alloys

KW - Nanoclusters

KW - Superconductor

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Superconductivity of Ni-Nb-Zr-H glassy alloys with nanoclusters

Abstract

Keywords

ASJC Scopus subject areas

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