Rotating speed effect on electronic transport behaviors of Ni-Nb-Zr-H glassy alloys

Mikio Fukuhara

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The electronic transport behaviors of (Ni 0.39Nb 0.25Zr 0.35) 100-yH y (0 ≤ y ≤ 15) glassy alloys, produced by rotating (or quenching) speeds of 3000 and 10,000 rpm, have been studied as a function of hydrogen content. These alloys show semiconducting, superior ballistic transport, superconducting and electric current-induced Coulomb oscillation, as hydrogen content increases. The resistivity for (Ni 0.39Nb 0.25Zr 0.35) 97.8H 2.2 alloy, produced by rotating speed of 10,000 rpm, displayed 0.1 nΩ cm, which is 0.01% of silver (1.62 μΩ cm) at room temperature, between 40 and 252 K. The Coulomb oscillation of the 10,000 rpm-(Ni 0.39Nb 0.25Zr 0.35) 95.2H 4.8 alloy is about 4-fold larger than that of the 3000 rpm-(Ni 0.39Nb 0.25Zr 0.35) 91.1H 8.9 alloy. Supercooling of the molten alloy induces a superior ballistic conductor and a room-temperature Coulomb oscillation at lower and higher hydrogen contents, respectively.

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume536
Issue numberSUPPL.1
DOIs
Publication statusPublished - 2012 Sep 25

Keywords

  • Ballistic transport
  • Coulomb oscillation
  • Glassy alloys
  • Hydrogen

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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