Study of superconducting properties of OCMG processed (Nd, Eu, Gd)-Ba-Cu-O with Pr doping

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Abstract

The superconducting and magnetic properties of oxygen-controlled-melt-grown (Nd, Eu, Gd)Ba2Cu3Oy (NEG-123) superconductors containing Pr in the concentration range x = 0 to 0.15 are reported. X-ray diffraction results confirmed the main phase as NEG-123 phase without any significant change in the crystal structure. Magnetization measurements revealed a depression of the superconducting transition temperature, Tc. The transitions are sharp at low Pr concentrations, however, a broad maximum begins to develop when the Pr concentration is x>0.1. The critical current densities, Jc, and the irreversibility fields are found to decrease on increasing the Pr content. It is also found that Jc of the Pr-doped composites for x = 0.12-0.15 is about five orders of magnitude lower than that of the pure NEG-123 composites. The fall in Tc and Jc on Pr doping is explained in terms of the partial substitution of Pr on the rare earth site and hole localization due to trivalent ions on the Ba site.

Original languageEnglish
Pages (from-to)277-284
Number of pages8
JournalPhysica C: Superconductivity and its Applications
Volume314
Issue number3
DOIs
Publication statusPublished - 1999 Mar 20
Externally publishedYes

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Doping (additives)
trivalent ions
composite materials
Composite materials
Rare earths
Superconducting materials
Superconducting transition temperature
low concentrations
Magnetization
critical current
Magnetic properties
Substitution reactions
rare earth elements
Crystal structure
transition temperature
Ions
substitutes
current density
Oxygen
magnetic properties

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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title = "Study of superconducting properties of OCMG processed (Nd, Eu, Gd)-Ba-Cu-O with Pr doping",
abstract = "The superconducting and magnetic properties of oxygen-controlled-melt-grown (Nd, Eu, Gd)Ba2Cu3Oy (NEG-123) superconductors containing Pr in the concentration range x = 0 to 0.15 are reported. X-ray diffraction results confirmed the main phase as NEG-123 phase without any significant change in the crystal structure. Magnetization measurements revealed a depression of the superconducting transition temperature, Tc. The transitions are sharp at low Pr concentrations, however, a broad maximum begins to develop when the Pr concentration is x>0.1. The critical current densities, Jc, and the irreversibility fields are found to decrease on increasing the Pr content. It is also found that Jc of the Pr-doped composites for x = 0.12-0.15 is about five orders of magnitude lower than that of the pure NEG-123 composites. The fall in Tc and Jc on Pr doping is explained in terms of the partial substitution of Pr on the rare earth site and hole localization due to trivalent ions on the Ba site.",
author = "Muralidhar Miryala and S. Koishikawa and Koblischka, {Michael Rudolf} and Masato Murakami",
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T1 - Study of superconducting properties of OCMG processed (Nd, Eu, Gd)-Ba-Cu-O with Pr doping

AU - Miryala, Muralidhar

AU - Koishikawa, S.

AU - Koblischka, Michael Rudolf

AU - Murakami, Masato

PY - 1999/3/20

Y1 - 1999/3/20

N2 - The superconducting and magnetic properties of oxygen-controlled-melt-grown (Nd, Eu, Gd)Ba2Cu3Oy (NEG-123) superconductors containing Pr in the concentration range x = 0 to 0.15 are reported. X-ray diffraction results confirmed the main phase as NEG-123 phase without any significant change in the crystal structure. Magnetization measurements revealed a depression of the superconducting transition temperature, Tc. The transitions are sharp at low Pr concentrations, however, a broad maximum begins to develop when the Pr concentration is x>0.1. The critical current densities, Jc, and the irreversibility fields are found to decrease on increasing the Pr content. It is also found that Jc of the Pr-doped composites for x = 0.12-0.15 is about five orders of magnitude lower than that of the pure NEG-123 composites. The fall in Tc and Jc on Pr doping is explained in terms of the partial substitution of Pr on the rare earth site and hole localization due to trivalent ions on the Ba site.

AB - The superconducting and magnetic properties of oxygen-controlled-melt-grown (Nd, Eu, Gd)Ba2Cu3Oy (NEG-123) superconductors containing Pr in the concentration range x = 0 to 0.15 are reported. X-ray diffraction results confirmed the main phase as NEG-123 phase without any significant change in the crystal structure. Magnetization measurements revealed a depression of the superconducting transition temperature, Tc. The transitions are sharp at low Pr concentrations, however, a broad maximum begins to develop when the Pr concentration is x>0.1. The critical current densities, Jc, and the irreversibility fields are found to decrease on increasing the Pr content. It is also found that Jc of the Pr-doped composites for x = 0.12-0.15 is about five orders of magnitude lower than that of the pure NEG-123 composites. The fall in Tc and Jc on Pr doping is explained in terms of the partial substitution of Pr on the rare earth site and hole localization due to trivalent ions on the Ba site.

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