Superconductivity in the Bi2Sr3-xLnxCu2Oy system and the excess of hole concentration in Bi2Sr2CanCu1+nOy (n=0 and 1)

Tohru Den; Jun Akimitsu

doi:10.1143/JJAP.28.L193

Superconductivity in the Bi₂Sr_3-xLn_xCu₂O_y system and the excess of hole concentration in Bi₂Sr₂Ca_nCu_1+nO_y (n=0 and 1)

Tohru Den, Jun Akimitsu

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

32 Citations (Scopus)

Abstract

A new family of high-T_c superconductors of Bi₂Sr_3-xLn_xCu₂O_y(Ln=Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Y) has been found by means of resistivity and magnetization measurements. The highest superconducting transition temperature was obtained when the substitution concentration x was about 0.3. The X-ray powder diffraction measurement showed that Bi₂Sr_2-xLn_xCuO_y (221 phase) is stable for x<0.3 and Bi₂Sr_3-xLn_xCu₂O_y (232 phase) becomes major when x exceeds 0.3. The 232 phase has the same structure as Bi₂Sr₂CaCu₂O_y. It is also demonstrated that the hole number p of [Cu-O]^+p in Bi₂Sr₂CuO_y and Bi₂Sr₂CaCu₂O_y is excessive compared with the proper value giving the highest T_c.

Original language	English
Pages (from-to)	L193-L196
Journal	Japanese Journal of Applied Physics
Volume	28
Issue number	2 A
DOIs	https://doi.org/10.1143/JJAP.28.L193
Publication status	Published - Feb 1989
Externally published	Yes

Keywords

Bi-Sr-Ln-Cu-O system
Oxide superconductor

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1143/JJAP.28.L193

Cite this

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title = "Superconductivity in the Bi2Sr3-xLnxCu2Oy system and the excess of hole concentration in Bi2Sr2CanCu1+nOy (n=0 and 1)",

abstract = "A new family of high-Tc superconductors of Bi2Sr3-xLnxCu2Oy(Ln=Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Y) has been found by means of resistivity and magnetization measurements. The highest superconducting transition temperature was obtained when the substitution concentration x was about 0.3. The X-ray powder diffraction measurement showed that Bi2Sr2-xLnxCuOy (221 phase) is stable for x<0.3 and Bi2Sr3-xLnxCu2Oy (232 phase) becomes major when x exceeds 0.3. The 232 phase has the same structure as Bi2Sr2CaCu2Oy. It is also demonstrated that the hole number p of [Cu-O]+p in Bi2Sr2CuOy and Bi2Sr2CaCu2Oy is excessive compared with the proper value giving the highest Tc.",

keywords = "Bi-Sr-Ln-Cu-O system, Oxide superconductor",

author = "Tohru Den and Jun Akimitsu",

year = "1989",

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doi = "10.1143/JJAP.28.L193",

language = "English",

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T1 - Superconductivity in the Bi2Sr3-xLnxCu2Oy system and the excess of hole concentration in Bi2Sr2CanCu1+nOy (n=0 and 1)

AU - Den, Tohru

AU - Akimitsu, Jun

PY - 1989/2

Y1 - 1989/2

N2 - A new family of high-Tc superconductors of Bi2Sr3-xLnxCu2Oy(Ln=Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Y) has been found by means of resistivity and magnetization measurements. The highest superconducting transition temperature was obtained when the substitution concentration x was about 0.3. The X-ray powder diffraction measurement showed that Bi2Sr2-xLnxCuOy (221 phase) is stable for x<0.3 and Bi2Sr3-xLnxCu2Oy (232 phase) becomes major when x exceeds 0.3. The 232 phase has the same structure as Bi2Sr2CaCu2Oy. It is also demonstrated that the hole number p of [Cu-O]+p in Bi2Sr2CuOy and Bi2Sr2CaCu2Oy is excessive compared with the proper value giving the highest Tc.

AB - A new family of high-Tc superconductors of Bi2Sr3-xLnxCu2Oy(Ln=Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm and Y) has been found by means of resistivity and magnetization measurements. The highest superconducting transition temperature was obtained when the substitution concentration x was about 0.3. The X-ray powder diffraction measurement showed that Bi2Sr2-xLnxCuOy (221 phase) is stable for x<0.3 and Bi2Sr3-xLnxCu2Oy (232 phase) becomes major when x exceeds 0.3. The 232 phase has the same structure as Bi2Sr2CaCu2Oy. It is also demonstrated that the hole number p of [Cu-O]+p in Bi2Sr2CuOy and Bi2Sr2CaCu2Oy is excessive compared with the proper value giving the highest Tc.

KW - Bi-Sr-Ln-Cu-O system

KW - Oxide superconductor

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