Superconductivity in the Bi2Sr3-xLnxCu2Oy system and the excess of hole concentration in Bi2Sr2Can Cu1+nOy(n=0 and 1)

Tohru Den, Jun Akimitsu

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30 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)193-196
Number of pages4
JournalJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
Volume28
Issue number2
Publication statusPublished - Feb 1989
Externally publishedYes

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Hole concentration
Superconductivity
superconductivity
X ray powder diffraction
Superconducting materials
Superconducting transition temperature
Magnetization
Substitution reactions
transition temperature
substitutes
magnetization
electrical resistivity
diffraction
x rays

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Superconductivity in the Bi2Sr3-xLnxCu2Oy system and the excess of hole concentration in Bi2Sr2Can Cu1+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.",
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T1 - Superconductivity in the Bi2Sr3-xLnxCu2Oy system and the excess of hole concentration in Bi2Sr2Can Cu1+nOy(n=0 and 1)

AU - Den, Tohru

AU - Akimitsu, Jun

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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.

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