Doping states of Hg-based superconducting cuprates

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

Doping states of Hg-based superconducting cuprates

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

Global course of Engineering and Science

Research output: Contribution to journal › Conference article

Abstract

Annealing effects on the lattice parameters, a and c, and superconducting critical temperatures, T_c, of the Hg-Ba-Ca-Cu-O superconductors were investigated. Strong correlations were found in the T_c 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 T_c 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 T_c's and also applied pressures greatly increased T_c's.

Original language	English
Pages (from-to)	80-83
Number of pages	4
Journal	Denshi Gijutsu Sogo Kenkyusho Iho/Bulletin of the Electrotechnical Laboratory
Volume	58
Issue number	6
Publication status	Published - 1994 Dec 1
Event	Proceedings of ETL Workshop on High Temperature Superconductors - Tsukuba, Jpn Duration: 1993 Dec 6 → 1993 Dec 8

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

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Adachi, S., Tokiwa-Yamamoto, A., Itoh, M., Isawa, K., Yamauchi, H., Takahashi, H., & Mori, N. (1994). Doping states of Hg-based superconducting cuprates. Denshi Gijutsu Sogo Kenkyusho Iho/Bulletin of the Electrotechnical Laboratory, 58(6), 80-83.

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abstract = "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.",

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

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TY - JOUR

T1 - Doping states of Hg-based superconducting cuprates

AU - Adachi, Seiji

AU - Tokiwa-Yamamoto, Ayako

AU - Itoh, Makoto

AU - Isawa, Kazuyuki

AU - Yamauchi, H.

AU - Takahashi, Hiroki

AU - Mori, Nobuo

PY - 1994/12/1

Y1 - 1994/12/1

N2 - 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.

AB - 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.

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