Effect of potassium addition on YBa2Cu3Ox superconductors

K. Inoue; N. Sakai; M. Murakami; I. Hirabayashi

doi:10.1016/j.physc.2006.03.093

Effect of potassium addition on YBa₂Cu₃O_x superconductors

K. Inoue, N. Sakai, M. Murakami, I. Hirabayashi

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

2 Citations (Scopus)

Abstract

Long period post-annealing in the oxygen atmosphere is necessary for YBa₂Cu₃O_x (Y123) bulk superconductors to impart superconductivity. We have investigated whether Y123 shows good superconductivity without oxygen annealing by potassium addition. If K⁺ ion substitutes on Ba²⁺ site since the size of K⁺ ion is close to that of Ba²⁺ ion, we can expect hole doping effect without additional oxygen annealing. We confirmed that the sample without potassium addition exhibited no superconductivity, while the sample with potassium addition had the onset T_c of above 90 K. This implies that the potassium addition certainly promotes the superconductivity of Y123.

Original language	English
Pages (from-to)	128-132
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	445-448
Issue number	1-2
DOIs	https://doi.org/10.1016/j.physc.2006.03.093
Publication status	Published - 2006 Oct 1

Keywords

Bulk
Potassium
YBaCuO

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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abstract = "Long period post-annealing in the oxygen atmosphere is necessary for YBa2Cu3Ox (Y123) bulk superconductors to impart superconductivity. We have investigated whether Y123 shows good superconductivity without oxygen annealing by potassium addition. If K+ ion substitutes on Ba2+ site since the size of K+ ion is close to that of Ba2+ ion, we can expect hole doping effect without additional oxygen annealing. We confirmed that the sample without potassium addition exhibited no superconductivity, while the sample with potassium addition had the onset Tc of above 90 K. This implies that the potassium addition certainly promotes the superconductivity of Y123.",

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AU - Inoue, K.

AU - Sakai, N.

AU - Murakami, M.

AU - Hirabayashi, I.

PY - 2006/10/1

Y1 - 2006/10/1

N2 - Long period post-annealing in the oxygen atmosphere is necessary for YBa2Cu3Ox (Y123) bulk superconductors to impart superconductivity. We have investigated whether Y123 shows good superconductivity without oxygen annealing by potassium addition. If K+ ion substitutes on Ba2+ site since the size of K+ ion is close to that of Ba2+ ion, we can expect hole doping effect without additional oxygen annealing. We confirmed that the sample without potassium addition exhibited no superconductivity, while the sample with potassium addition had the onset Tc of above 90 K. This implies that the potassium addition certainly promotes the superconductivity of Y123.

AB - Long period post-annealing in the oxygen atmosphere is necessary for YBa2Cu3Ox (Y123) bulk superconductors to impart superconductivity. We have investigated whether Y123 shows good superconductivity without oxygen annealing by potassium addition. If K+ ion substitutes on Ba2+ site since the size of K+ ion is close to that of Ba2+ ion, we can expect hole doping effect without additional oxygen annealing. We confirmed that the sample without potassium addition exhibited no superconductivity, while the sample with potassium addition had the onset Tc of above 90 K. This implies that the potassium addition certainly promotes the superconductivity of Y123.

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KW - Potassium

KW - YBaCuO

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