Synthesis of HgBa2Ca3Cu4Oy under ambient pressure

R. Usami, S. Adachi, M. Itoh, T. Tatsuki, A. Tokiwa-Yamamoto, K. Tanabe

研究成果: Article査読

16 被引用数 (Scopus)

抄録

The mercury-based oxide superconductor, HgBa2Ca3Cu4Oy phases was synthesized by a controlled vapor/solid reaction technique using high-purity powders of HgO, BaO, CaO and CuO as starting materials. Two types of bars, with different cation ratios of Hg:Ba:Ca:Cu=0:2:2:3 and 1:2:2:3, were heated in an evacuated quartz tube. The resulting HgBa2Ca3Cu4Oy sample had a Tc of 123 K and lattice parameters a=3.852(2) Å and c=19.01(4) Å with a volume fraction of 83% of the total shielding signal. The formation condition was widely investigated, showing that the higher heating temperature and longer heating time lead to the formation of the HgBa2CanCun-1Oy phase with a higher number n of Cu-O2 planes in a unit cell.

本文言語English
ページ(範囲)21-26
ページ数6
ジャーナルPhysica C: Superconductivity and its applications
262
1-2
DOI
出版ステータスPublished - 1996 5 10
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • エネルギー工学および電力技術
  • 電子工学および電気工学

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