Superconductivity in (Pb/Cu)-"1222" copper oxides

Naomichi Sakai; Toshihiko Maeda; H. Yamauchi; Shoji Tanaka

doi:10.1016/0921-4534(93)90487-B

Superconductivity in (Pb/Cu)-"1222" copper oxides

Naomichi Sakai, Toshihiko Maeda, H. Yamauchi, Shoji Tanaka

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

23 Citations (Scopus)

Abstract

The superconductivity in (Pb/Cu)-"1222" cuprates, (Pb, Cu) (Sr, Ln)₂(Ln, Ce)₂Cu₂O_z (Ln=Sm, Eu, Gd, Dy and Ho), has been found to be strongly dependent on the oxygen content as well as on the species of Ln ion. While the samples with Ln=Sm, Eu, Gd and Dy prepared in O₂ at an ambient pressure exhibit superconductivity, those with Ln=Ho required post-annealing in O₂ of a high pressure to become superconductors. It was likely that the ionic radius of Ln³⁺ and oxygen stoichiometry were strongly related to each other and both played important roles in the occurrence of superconductivity in the (Pb/Cu)-"1222" compounds.

Original language	English
Pages (from-to)	75-80
Number of pages	6
Journal	Physica C: Superconductivity and its applications
Volume	212
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(93)90487-B
Publication status	Published - 1993 Jul 1
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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10.1016/0921-4534(93)90487-B

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Cite this

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title = "Superconductivity in (Pb/Cu)-{"}1222{"} copper oxides",

abstract = "The superconductivity in (Pb/Cu)-{"}1222{"} cuprates, (Pb, Cu) (Sr, Ln)2(Ln, Ce)2Cu2Oz (Ln=Sm, Eu, Gd, Dy and Ho), has been found to be strongly dependent on the oxygen content as well as on the species of Ln ion. While the samples with Ln=Sm, Eu, Gd and Dy prepared in O2 at an ambient pressure exhibit superconductivity, those with Ln=Ho required post-annealing in O2 of a high pressure to become superconductors. It was likely that the ionic radius of Ln3+ and oxygen stoichiometry were strongly related to each other and both played important roles in the occurrence of superconductivity in the (Pb/Cu)-{"}1222{"} compounds.",

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AU - Sakai, Naomichi

AU - Maeda, Toshihiko

AU - Yamauchi, H.

AU - Tanaka, Shoji

PY - 1993/7/1

Y1 - 1993/7/1

N2 - The superconductivity in (Pb/Cu)-"1222" cuprates, (Pb, Cu) (Sr, Ln)2(Ln, Ce)2Cu2Oz (Ln=Sm, Eu, Gd, Dy and Ho), has been found to be strongly dependent on the oxygen content as well as on the species of Ln ion. While the samples with Ln=Sm, Eu, Gd and Dy prepared in O2 at an ambient pressure exhibit superconductivity, those with Ln=Ho required post-annealing in O2 of a high pressure to become superconductors. It was likely that the ionic radius of Ln3+ and oxygen stoichiometry were strongly related to each other and both played important roles in the occurrence of superconductivity in the (Pb/Cu)-"1222" compounds.

AB - The superconductivity in (Pb/Cu)-"1222" cuprates, (Pb, Cu) (Sr, Ln)2(Ln, Ce)2Cu2Oz (Ln=Sm, Eu, Gd, Dy and Ho), has been found to be strongly dependent on the oxygen content as well as on the species of Ln ion. While the samples with Ln=Sm, Eu, Gd and Dy prepared in O2 at an ambient pressure exhibit superconductivity, those with Ln=Ho required post-annealing in O2 of a high pressure to become superconductors. It was likely that the ionic radius of Ln3+ and oxygen stoichiometry were strongly related to each other and both played important roles in the occurrence of superconductivity in the (Pb/Cu)-"1222" compounds.

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