Effects of oxygen content on the superconducting properties of melt-textured LRE123 superconductors

N. Chikumoto; S. Ozawa; S. I. Yoo; N. Hayashi; M. Murakami

doi:10.1016/S0921-4534(97)00115-9

Effects of oxygen content on the superconducting properties of melt-textured LRE123 superconductors

N. Chikumoto, S. Ozawa, S. I. Yoo, N. Hayashi, M. Murakami

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

27 Citations (Scopus)

Abstract

The effects of oxygen content on the superconducting transition temperatures, T_c, and magnetic properties of melt-textured LRE123 (LRE = Nd, Sm) superconductors were studied. The oxygen content could be varied by changing the annealing temperature, T_a, in that the oxygen deficiency, δ, monotonically decreased with decreasing the T_a from 600°C to 300°C. A further decrease of T_a to 275°C showed no appreciable change. In both systems the highest T_c was obtained for the samples annealed at 300°C. Magnetic properties were also strongly dependent on the oxygen content, showing that the control of oxygen content is critical for achieving good pinning properties.

Original language	English
Pages (from-to)	187-191
Number of pages	5
Journal	Physica C: Superconductivity and its applications
Volume	278
Issue number	3-4
DOIs	https://doi.org/10.1016/S0921-4534(97)00115-9
Publication status	Published - 1997 May 1
Externally published	Yes

Keywords

Critical current density
Irreversibility field
LRE123
Melt-processing
Oxygen deficiency
Peak effect

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 = "Effects of oxygen content on the superconducting properties of melt-textured LRE123 superconductors",

abstract = "The effects of oxygen content on the superconducting transition temperatures, Tc, and magnetic properties of melt-textured LRE123 (LRE = Nd, Sm) superconductors were studied. The oxygen content could be varied by changing the annealing temperature, Ta, in that the oxygen deficiency, δ, monotonically decreased with decreasing the Ta from 600°C to 300°C. A further decrease of Ta to 275°C showed no appreciable change. In both systems the highest Tc was obtained for the samples annealed at 300°C. Magnetic properties were also strongly dependent on the oxygen content, showing that the control of oxygen content is critical for achieving good pinning properties.",

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author = "N. Chikumoto and S. Ozawa and Yoo, {S. I.} and N. Hayashi and M. Murakami",

note = "Funding Information: This work was supported by NEDO for the R&D of Industrial Science and Technology Frontier Program.",

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AU - Chikumoto, N.

AU - Ozawa, S.

AU - Yoo, S. I.

AU - Hayashi, N.

AU - Murakami, M.

N1 - Funding Information: This work was supported by NEDO for the R&D of Industrial Science and Technology Frontier Program.

PY - 1997/5/1

Y1 - 1997/5/1

N2 - The effects of oxygen content on the superconducting transition temperatures, Tc, and magnetic properties of melt-textured LRE123 (LRE = Nd, Sm) superconductors were studied. The oxygen content could be varied by changing the annealing temperature, Ta, in that the oxygen deficiency, δ, monotonically decreased with decreasing the Ta from 600°C to 300°C. A further decrease of Ta to 275°C showed no appreciable change. In both systems the highest Tc was obtained for the samples annealed at 300°C. Magnetic properties were also strongly dependent on the oxygen content, showing that the control of oxygen content is critical for achieving good pinning properties.

AB - The effects of oxygen content on the superconducting transition temperatures, Tc, and magnetic properties of melt-textured LRE123 (LRE = Nd, Sm) superconductors were studied. The oxygen content could be varied by changing the annealing temperature, Ta, in that the oxygen deficiency, δ, monotonically decreased with decreasing the Ta from 600°C to 300°C. A further decrease of Ta to 275°C showed no appreciable change. In both systems the highest Tc was obtained for the samples annealed at 300°C. Magnetic properties were also strongly dependent on the oxygen content, showing that the control of oxygen content is critical for achieving good pinning properties.

KW - Critical current density

KW - Irreversibility field

KW - LRE123

KW - Melt-processing

KW - Oxygen deficiency

KW - Peak effect

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Effects of oxygen content on the superconducting properties of melt-textured LRE123 superconductors

Abstract

Keywords

ASJC Scopus subject areas

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