Synthesis and superconductivity of a new high-TcTl-Ba-Ca-Cu-O phase

Masae Kikuchi, Norio Kobayashi, Hideo Iwasaki, Daisuke Shindo, Takeo Oku, Ayako Tokiwa, Tsuyoshi Kajitani, Kenji Hiraga, Yasuhiko Syono, Yoshio Muto

研究成果: Article査読

18 被引用数 (Scopus)

抄録

A 120 K-class superconductor in the Tl-Ba-Ca-Cu-O system was synthesized, and the flux exclusion proved to be greater than 90% of the perfect diamagnetism. X-ray and electron diffraction studies showed a tetragonal unit cell with lattice parameters a=5.4454(7) Å and c=35.586(9) Å, indicating triple perovskite-like layers interposed between Tl2O2layers. A structure model is proposed, in which the layer sequence along the c-axis is Tl2O2-BaO-CuO2-Ca-CuO2-Ca-CuO2-BaO. The chemical composition is Tl2Ba2Ca2Cu3O10+xassuming trivalent thallium. If the same average Cu valence as in YBa2Cu3O7is assumed, this composition requires x=0.5 for oxygen.

本文言語English
ページ(範囲)L1050-L1053
ジャーナルJapanese Journal of Applied Physics
27
6A
DOI
出版ステータスPublished - 1988 6
外部発表はい

ASJC Scopus subject areas

  • 工学(全般)
  • 物理学および天文学(全般)

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