Crystal phases of bisrcacu2ox heat treated in a vacuum-sealed system

Yoshio Oka, Naoichi Yamamoto, Akiko Kubo, Hitoshi Kitaguchi, Jun Takada

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Heat treatment in a vacuum-sealed system on BiSrCaCu2Ox was studied in comparison with that in air. The melting temperature was lowered from 880°C in air to 850°C in the vacuum-sealed system. The formation of the phase with 37 Å c spacing was enhanced in the vacuum-sealed system by heating above the melting temperature and the infsequent annealing in air improved the sharpness of the superconducting transition at 110 K. The heat treatment in the reduced pressure also caused the reduction of the Cu ion and it was suggested that the oxidation state of the Cu ion played an important role in the formation of the phase with 37 Å c spacing.

Original languageEnglish
Pages (from-to)L1429-L1431
JournalJapanese journal of applied physics
Volume27
Issue number8 A
DOIs
Publication statusPublished - 1988 Jan 1
Externally publishedYes

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vacuum systems
Vacuum
heat
Crystals
Melting point
air
heat treatment
Air
Heat treatment
spacing
melting
crystals
sharpness
Ions
ions
Annealing
Heating
Oxidation
oxidation
annealing

Keywords

  • BiSrCaCu20
  • High-7c superconductivity
  • Layered structure
  • Oxidation state
  • Vacuum-sealed system

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Crystal phases of bisrcacu2ox heat treated in a vacuum-sealed system. / Oka, Yoshio; Yamamoto, Naoichi; Kubo, Akiko; Kitaguchi, Hitoshi; Takada, Jun.

In: Japanese journal of applied physics, Vol. 27, No. 8 A, 01.01.1988, p. L1429-L1431.

Research output: Contribution to journalArticle

Oka, Yoshio ; Yamamoto, Naoichi ; Kubo, Akiko ; Kitaguchi, Hitoshi ; Takada, Jun. / Crystal phases of bisrcacu2ox heat treated in a vacuum-sealed system. In: Japanese journal of applied physics. 1988 ; Vol. 27, No. 8 A. pp. L1429-L1431.
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