Structural and superconducting properties of (Hg1 - XTlx)2Ba2Can-1Cu nOy (n = 3, 4) superconductors prepared under high pressure

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

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Double (Hg,Tl)-O layer superconductors with three or four CuO2 sheets, (Hg1-xTlx)2Ba2Ca n-1CunOy (x = 0.3-0.6; n = 3, 4), have been synthesized under high pressure and high temperature. These compounds are members of a new homologous series, (Hg,Tl)-22(n - 1)n. The effects of Tl content on the formation and superconductivity of the (Hg,Tl)-2223 and -2234 phases are investigated. Both the phases are stabilized for the nominal Tl content x of 0.3-0.6. Tc of as-sintered (Hg,Tl)-2223 phases increases from 45 K to 81 K with an increase in x, and that of Ar-annealed samples increases up to ∼ 90 K, accompanied with an expansion of the c-axis. These changes can be explained considering that as-synthesized 2223 phases are highly overdoped. In contrast, Tc of (Hg,Tl)-2234 phases is almost unchanged (∼ 115 K) irrespectively of both the Tl content and Ar-annealing, suggesting that they are nearly optimally doped.

Original languageEnglish
Pages (from-to)65-71
Number of pages7
JournalPhysica C: Superconductivity and its Applications
Volume273
Issue number1-2
Publication statusPublished - 1996 Dec 15
Externally publishedYes

Fingerprint

Superconductivity
Superconducting materials
Annealing
Temperature
superconductivity
annealing
expansion
temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Structural and superconducting properties of (Hg1 - XTlx)2Ba2Can-1Cu nOy (n = 3, 4) superconductors prepared under high pressure. / Tatsuki, T.; Yamamoto, Ayako; Tamura, T.; Wu, X. J.; Moriwaki, Y.; Adachi, S.; Tanabe, K.

In: Physica C: Superconductivity and its Applications, Vol. 273, No. 1-2, 15.12.1996, p. 65-71.

Research output: Contribution to journalArticle

@article{01d824ffd52442d18a8b0d5470075d54,
title = "Structural and superconducting properties of (Hg1 - XTlx)2Ba2Can-1Cu nOy (n = 3, 4) superconductors prepared under high pressure",
abstract = "Double (Hg,Tl)-O layer superconductors with three or four CuO2 sheets, (Hg1-xTlx)2Ba2Ca n-1CunOy (x = 0.3-0.6; n = 3, 4), have been synthesized under high pressure and high temperature. These compounds are members of a new homologous series, (Hg,Tl)-22(n - 1)n. The effects of Tl content on the formation and superconductivity of the (Hg,Tl)-2223 and -2234 phases are investigated. Both the phases are stabilized for the nominal Tl content x of 0.3-0.6. Tc of as-sintered (Hg,Tl)-2223 phases increases from 45 K to 81 K with an increase in x, and that of Ar-annealed samples increases up to ∼ 90 K, accompanied with an expansion of the c-axis. These changes can be explained considering that as-synthesized 2223 phases are highly overdoped. In contrast, Tc of (Hg,Tl)-2234 phases is almost unchanged (∼ 115 K) irrespectively of both the Tl content and Ar-annealing, suggesting that they are nearly optimally doped.",
author = "T. Tatsuki and Ayako Yamamoto and T. Tamura and Wu, {X. J.} and Y. Moriwaki and S. Adachi and K. Tanabe",
year = "1996",
month = "12",
day = "15",
language = "English",
volume = "273",
pages = "65--71",
journal = "Physica C: Superconductivity and its Applications",
issn = "0921-4534",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - Structural and superconducting properties of (Hg1 - XTlx)2Ba2Can-1Cu nOy (n = 3, 4) superconductors prepared under high pressure

AU - Tatsuki, T.

AU - Yamamoto, Ayako

AU - Tamura, T.

AU - Wu, X. J.

AU - Moriwaki, Y.

AU - Adachi, S.

AU - Tanabe, K.

PY - 1996/12/15

Y1 - 1996/12/15

N2 - Double (Hg,Tl)-O layer superconductors with three or four CuO2 sheets, (Hg1-xTlx)2Ba2Ca n-1CunOy (x = 0.3-0.6; n = 3, 4), have been synthesized under high pressure and high temperature. These compounds are members of a new homologous series, (Hg,Tl)-22(n - 1)n. The effects of Tl content on the formation and superconductivity of the (Hg,Tl)-2223 and -2234 phases are investigated. Both the phases are stabilized for the nominal Tl content x of 0.3-0.6. Tc of as-sintered (Hg,Tl)-2223 phases increases from 45 K to 81 K with an increase in x, and that of Ar-annealed samples increases up to ∼ 90 K, accompanied with an expansion of the c-axis. These changes can be explained considering that as-synthesized 2223 phases are highly overdoped. In contrast, Tc of (Hg,Tl)-2234 phases is almost unchanged (∼ 115 K) irrespectively of both the Tl content and Ar-annealing, suggesting that they are nearly optimally doped.

AB - Double (Hg,Tl)-O layer superconductors with three or four CuO2 sheets, (Hg1-xTlx)2Ba2Ca n-1CunOy (x = 0.3-0.6; n = 3, 4), have been synthesized under high pressure and high temperature. These compounds are members of a new homologous series, (Hg,Tl)-22(n - 1)n. The effects of Tl content on the formation and superconductivity of the (Hg,Tl)-2223 and -2234 phases are investigated. Both the phases are stabilized for the nominal Tl content x of 0.3-0.6. Tc of as-sintered (Hg,Tl)-2223 phases increases from 45 K to 81 K with an increase in x, and that of Ar-annealed samples increases up to ∼ 90 K, accompanied with an expansion of the c-axis. These changes can be explained considering that as-synthesized 2223 phases are highly overdoped. In contrast, Tc of (Hg,Tl)-2234 phases is almost unchanged (∼ 115 K) irrespectively of both the Tl content and Ar-annealing, suggesting that they are nearly optimally doped.

UR - http://www.scopus.com/inward/record.url?scp=0030388067&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0030388067&partnerID=8YFLogxK

M3 - Article

VL - 273

SP - 65

EP - 71

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

SN - 0921-4534

IS - 1-2

ER -