High-pressure synthesis of a new homologous series of superconductors, (Hg1-xTlx)2Ba2Ca n-1CunOy (0.3 ≤ x ≤ 0.6, n=3,4)

T. Tatsuki, Ayako Yamamoto, T. Tamura, X. J. Wu, Y. Moriwaki, S. Adachi, K. Tanabe

Research output: Contribution to journalArticle

Abstract

We have recently synthesized new superconducting cuprates containing a mercury-based bilayer, i.e. (Hg, Tl)2Ba2(Ca, Y)Cu2Oy and (Hg1-xTlx)2Ba2Ca n-1CunOy (x ∼ 0.4, n = 3, 4) by a high-pressure technique. These compounds are the n=2, 3 and 4 members of a new homologous series, (Hg, Tl)-22(n - 1)n. The effects of Tl substitution for Hg on the formation and superconductivity of the (Hg, Tl)-2223 and -2234 phases are investigated. Both the phases are stabilized for the Tl content x of 0.3-0.6. Tc of the as-synthesized (Hg, Tl)-2223 compound increases from 45 K to 81 K with an increase in x. In contrast, Tc of the (Hg,Tl)-2234 compound is almost independent of x (∼114 K).

Original languageEnglish
Pages (from-to)1559-1564
Number of pages6
JournalJournal of Low Temperature Physics
Volume105
Issue number5-6
Publication statusPublished - 1996
Externally publishedYes

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Superconductivity
Mercury
cuprates
Superconducting materials
Substitution reactions
superconductivity
substitutes
synthesis

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

High-pressure synthesis of a new homologous series of superconductors, (Hg1-xTlx)2Ba2Ca n-1CunOy (0.3 ≤ x ≤ 0.6, n=3,4). / Tatsuki, T.; Yamamoto, Ayako; Tamura, T.; Wu, X. J.; Moriwaki, Y.; Adachi, S.; Tanabe, K.

In: Journal of Low Temperature Physics, Vol. 105, No. 5-6, 1996, p. 1559-1564.

Research output: Contribution to journalArticle

Tatsuki, T. ; Yamamoto, Ayako ; Tamura, T. ; Wu, X. J. ; Moriwaki, Y. ; Adachi, S. ; Tanabe, K. / High-pressure synthesis of a new homologous series of superconductors, (Hg1-xTlx)2Ba2Ca n-1CunOy (0.3 ≤ x ≤ 0.6, n=3,4). In: Journal of Low Temperature Physics. 1996 ; Vol. 105, No. 5-6. pp. 1559-1564.
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AU - Tatsuki, T.

AU - Yamamoto, Ayako

AU - Tamura, T.

AU - Wu, X. J.

AU - Moriwaki, Y.

AU - Adachi, S.

AU - Tanabe, K.

PY - 1996

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AB - We have recently synthesized new superconducting cuprates containing a mercury-based bilayer, i.e. (Hg, Tl)2Ba2(Ca, Y)Cu2Oy and (Hg1-xTlx)2Ba2Ca n-1CunOy (x ∼ 0.4, n = 3, 4) by a high-pressure technique. These compounds are the n=2, 3 and 4 members of a new homologous series, (Hg, Tl)-22(n - 1)n. The effects of Tl substitution for Hg on the formation and superconductivity of the (Hg, Tl)-2223 and -2234 phases are investigated. Both the phases are stabilized for the Tl content x of 0.3-0.6. Tc of the as-synthesized (Hg, Tl)-2223 compound increases from 45 K to 81 K with an increase in x. In contrast, Tc of the (Hg,Tl)-2234 compound is almost independent of x (∼114 K).

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