HIGH-FIELD SUPERCONDUCTIVITY IN RAPIDLY QUENCHED Ge-(Pb, Bi, Sn) ALLOYS.

K. Matsuzaki, A. Inoue, M. Oguchi, Naoki Toyota, T. Masumoto

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1 Citation (Scopus)

Abstract

Rapidly quenched Ge-based alloys containing insoluble Pb, Bi and Sn have been found to exhibit superconducting behavior, particularly a markedly enhanced upper critical field H//c//2 which is higher than the highest value (15. 0T at 2. 0K) of commercial Nb-Ti superconducting alloys. The rapidly quenched structure consists of cubic-Ge and fcc-Pb for Ge-Pb alloys, cubic-Ge and epsilon (Pb-Bi) phases for Ge-Pb-Bi alloys; and cubic-Ge and Pb together with tetragonal Sn for Ge-Pb-Sn alloys. The Pb, epsilon (Pb-Bi) and Sn second phases all lie preferentially and discontinuously along the grain boundaries of the Ge matrix, in addition to their transgranular precipitation observed. The remarkable enhancement of H//c//2 is interpreted as due mainly to a significant decrease of the coherence length which results from a large reduction of the effective mean free path of the electrons.

Original languageEnglish
Pages (from-to)1-10
Number of pages10
JournalInternational journal of rapid solidification
Volume3
Issue number1
Publication statusPublished - 1987 Dec 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

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