Doping states and irreversibility fields of high-pressure-synthesized (Tl,Cu)Sr2Ca2Cu3Oy superconductors

T. Shibata; T. Tatsuki; S. Adachi; K. Tanabe; S. Fujihara; T. Kimura

doi:10.1016/S0921-4534(00)01745-7

Doping states and irreversibility fields of high-pressure-synthesized (Tl,Cu)Sr₂Ca₂Cu₃O_y superconductors

T. Shibata, T. Tatsuki, S. Adachi, K. Tanabe, S. Fujihara, T. Kimura

Department of Applied Chemistry

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The effects of Cu substitution for Tl in TlSr₂Ca₂Cu₃O_y superconductor were investigated. Nearly single-phase samples of Tl_1-xCu_xSr₂Ca₂Cu₃ O_y (x = 0.2-0.6) were successfully synthesized using a high pressure technique. The observed shrinkage in the lattice parameter a, concave ρ-T curve above T_c and negative thermoelectric power near room temperature indicated that the Cu-substituted samples were over-doped. T_c for the sample with x = 0.4 increased from 73 to 94 K after annealing treatment in flowing argon gas. The Cu-substituted samples showed lower irreversibility field B_irr as a function of reduced temperature than that of the pristine TlSr₂Ca₂Cu₃O_y [Physica C 324 (1999) 15].

Original language	English
Pages (from-to)	200-206
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	353
Issue number	3-4
DOIs	https://doi.org/10.1016/S0921-4534(00)01745-7
Publication status	Published - 2001 May 15

Keywords

Resistivity
Substitution irreversibility field
Thermoelectric power
Tl-1223
Tl-Sr-Ca-Cu-O

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(00)01745-7

Cite this

@article{0b4758969b4e4b478fab6d5626919372,

title = "Doping states and irreversibility fields of high-pressure-synthesized (Tl,Cu)Sr2Ca2Cu3Oy superconductors",

abstract = "The effects of Cu substitution for Tl in TlSr2Ca2Cu3Oy superconductor were investigated. Nearly single-phase samples of Tl1-xCuxSr2Ca2Cu3 Oy (x = 0.2-0.6) were successfully synthesized using a high pressure technique. The observed shrinkage in the lattice parameter a, concave ρ-T curve above Tc and negative thermoelectric power near room temperature indicated that the Cu-substituted samples were over-doped. Tc for the sample with x = 0.4 increased from 73 to 94 K after annealing treatment in flowing argon gas. The Cu-substituted samples showed lower irreversibility field Birr as a function of reduced temperature than that of the pristine TlSr2Ca2Cu3Oy [Physica C 324 (1999) 15].",

keywords = "Resistivity, Substitution irreversibility field, Thermoelectric power, Tl-1223, Tl-Sr-Ca-Cu-O",

author = "T. Shibata and T. Tatsuki and S. Adachi and K. Tanabe and S. Fujihara and T. Kimura",

note = "Funding Information: The authors would like to thank Dr. S. Tajima of SRL-ISTEC for encouragement. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications under the New Sunshine Program administered by the Agency of Industrial Science and Technology (AIST) of the Ministry of International Trade and Industry (MITI) of Japan.",

year = "2001",

month = may,

day = "15",

doi = "10.1016/S0921-4534(00)01745-7",

language = "English",

volume = "353",

pages = "200--206",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

publisher = "Elsevier",

number = "3-4",

}

TY - JOUR

T1 - Doping states and irreversibility fields of high-pressure-synthesized (Tl,Cu)Sr2Ca2Cu3Oy superconductors

AU - Shibata, T.

AU - Tatsuki, T.

AU - Adachi, S.

AU - Tanabe, K.

AU - Fujihara, S.

AU - Kimura, T.

N1 - Funding Information: The authors would like to thank Dr. S. Tajima of SRL-ISTEC for encouragement. This work was supported by the New Energy and Industrial Technology Development Organization (NEDO) as Collaborative Research and Development of Fundamental Technologies for Superconductivity Applications under the New Sunshine Program administered by the Agency of Industrial Science and Technology (AIST) of the Ministry of International Trade and Industry (MITI) of Japan.

PY - 2001/5/15

Y1 - 2001/5/15

N2 - The effects of Cu substitution for Tl in TlSr2Ca2Cu3Oy superconductor were investigated. Nearly single-phase samples of Tl1-xCuxSr2Ca2Cu3 Oy (x = 0.2-0.6) were successfully synthesized using a high pressure technique. The observed shrinkage in the lattice parameter a, concave ρ-T curve above Tc and negative thermoelectric power near room temperature indicated that the Cu-substituted samples were over-doped. Tc for the sample with x = 0.4 increased from 73 to 94 K after annealing treatment in flowing argon gas. The Cu-substituted samples showed lower irreversibility field Birr as a function of reduced temperature than that of the pristine TlSr2Ca2Cu3Oy [Physica C 324 (1999) 15].

AB - The effects of Cu substitution for Tl in TlSr2Ca2Cu3Oy superconductor were investigated. Nearly single-phase samples of Tl1-xCuxSr2Ca2Cu3 Oy (x = 0.2-0.6) were successfully synthesized using a high pressure technique. The observed shrinkage in the lattice parameter a, concave ρ-T curve above Tc and negative thermoelectric power near room temperature indicated that the Cu-substituted samples were over-doped. Tc for the sample with x = 0.4 increased from 73 to 94 K after annealing treatment in flowing argon gas. The Cu-substituted samples showed lower irreversibility field Birr as a function of reduced temperature than that of the pristine TlSr2Ca2Cu3Oy [Physica C 324 (1999) 15].

KW - Resistivity

KW - Substitution irreversibility field

KW - Thermoelectric power

KW - Tl-1223

KW - Tl-Sr-Ca-Cu-O

UR - http://www.scopus.com/inward/record.url?scp=0035873408&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035873408&partnerID=8YFLogxK

U2 - 10.1016/S0921-4534(00)01745-7

DO - 10.1016/S0921-4534(00)01745-7

M3 - Article

AN - SCOPUS:0035873408

SN - 0921-4534

VL - 353

SP - 200

EP - 206

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 3-4

ER -