Doping states of Hg-based superconducting cuprates

Seiji Adachi, Ayako Tokiwa-Yamamoto, Makoto Itoh, Kazuyuki Isawa, H. Yamauchi, Hiroki Takahashi, Nobuo Mori

Research output: Contribution to journalConference articlepeer-review


Annealing effects on the lattice parameters, a and c, and superconducting critical temperatures, Tc, of the Hg-Ba-Ca-Cu-O superconductors were investigated. Strong correlations were found in the Tc vs. a and c relationships for the Hg-1201 phase. This implies that a Hg-1201 sample in either 'under-doped' or 'over-doped' state can be prepared. For the Hg-1212 and 1223 phases, no strong correlations were seen in the Tc vs. a and c relationships. All the Hg-1223 samples presently prepared seemed to be in 'underdoped' states, because annealing treatments in an oxygen gas enhanced their Tc's and also applied pressures greatly increased Tc's.

Original languageEnglish
Pages (from-to)80-83
Number of pages4
JournalDenshi Gijutsu Sogo Kenkyusho Iho/Bulletin of the Electrotechnical Laboratory
Issue number6
Publication statusPublished - 1994 Dec 1
Externally publishedYes
EventProceedings of ETL Workshop on High Temperature Superconductors - Tsukuba, Jpn
Duration: 1993 Dec 61993 Dec 8

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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