Synthesis conditions and superconductivity of Pb0.7Cu0.3Sr2Y0.5Ca 0.5Cu2Oy

Masae Kikuchi; Minako Shida; Eriko Ohshima; Yuji Muraoka; Yasuhiko Syono

doi:10.1016/0921-4534(95)00824-1

Synthesis conditions and superconductivity of Pb_0.7Cu_0.3Sr₂Y_0.5Ca _0.5Cu₂O_y

Masae Kikuchi, Minako Shida, Eriko Ohshima, Yuji Muraoka, Yasuhiko Syono

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

2 Citations (Scopus)

Abstract

Pb_0.7Cu_0.3Sr₂Y_0.5Ca _0.5Cu₂O_y was synthesized as a mother specimen in air and then annealed under two different experimental conditions, in an oxidizing and in a reducing condition. The mother specimen was a nonsuperconductor, but both annealed specimens, one quenched from high temperature and the other treated in high-pressure O₂, were superconductors with T_c's of about 50 K and about 60 K, respectively. The low Cu-valence of the quenched specimen which showed superconductivity suggests a decrease in the Pb-valence, while the high T_c of the specimen treated in high-pressure O₂ would be explained by high Cu-valence and Pb⁴⁺.

Original language	English
Pages (from-to)	204-207
Number of pages	4
Journal	Physica C: Superconductivity and its applications
Volume	263
Issue number	1-4
DOIs	https://doi.org/10.1016/0921-4534(95)00824-1
Publication status	Published - May 1996
Externally published	Yes

ASJC Scopus subject areas

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

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title = "Synthesis conditions and superconductivity of Pb0.7Cu0.3Sr2Y0.5Ca 0.5Cu2Oy",

abstract = "Pb0.7Cu0.3Sr2Y0.5Ca 0.5Cu2Oy was synthesized as a mother specimen in air and then annealed under two different experimental conditions, in an oxidizing and in a reducing condition. The mother specimen was a nonsuperconductor, but both annealed specimens, one quenched from high temperature and the other treated in high-pressure O2, were superconductors with Tc's of about 50 K and about 60 K, respectively. The low Cu-valence of the quenched specimen which showed superconductivity suggests a decrease in the Pb-valence, while the high Tc of the specimen treated in high-pressure O2 would be explained by high Cu-valence and Pb4+.",

author = "Masae Kikuchi and Minako Shida and Eriko Ohshima and Yuji Muraoka and Yasuhiko Syono",

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doi = "10.1016/0921-4534(95)00824-1",

language = "English",

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

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TY - JOUR

T1 - Synthesis conditions and superconductivity of Pb0.7Cu0.3Sr2Y0.5Ca 0.5Cu2Oy

AU - Kikuchi, Masae

AU - Shida, Minako

AU - Ohshima, Eriko

AU - Muraoka, Yuji

AU - Syono, Yasuhiko

PY - 1996/5

Y1 - 1996/5

N2 - Pb0.7Cu0.3Sr2Y0.5Ca 0.5Cu2Oy was synthesized as a mother specimen in air and then annealed under two different experimental conditions, in an oxidizing and in a reducing condition. The mother specimen was a nonsuperconductor, but both annealed specimens, one quenched from high temperature and the other treated in high-pressure O2, were superconductors with Tc's of about 50 K and about 60 K, respectively. The low Cu-valence of the quenched specimen which showed superconductivity suggests a decrease in the Pb-valence, while the high Tc of the specimen treated in high-pressure O2 would be explained by high Cu-valence and Pb4+.

AB - Pb0.7Cu0.3Sr2Y0.5Ca 0.5Cu2Oy was synthesized as a mother specimen in air and then annealed under two different experimental conditions, in an oxidizing and in a reducing condition. The mother specimen was a nonsuperconductor, but both annealed specimens, one quenched from high temperature and the other treated in high-pressure O2, were superconductors with Tc's of about 50 K and about 60 K, respectively. The low Cu-valence of the quenched specimen which showed superconductivity suggests a decrease in the Pb-valence, while the high Tc of the specimen treated in high-pressure O2 would be explained by high Cu-valence and Pb4+.

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JO - Physica C: Superconductivity and its Applications

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Synthesis conditions and superconductivity of Pb_0.7Cu_0.3Sr₂Y_0.5Ca _0.5Cu₂O_y

Abstract

ASJC Scopus subject areas

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