Enhancement of Jc by 211 particles in ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy melt-processed superconductors

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Abstract

(Nd0.33Eu0.33Gd0.33)2BaCuO 5 (NEG-211) particles are added to ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy (NEG) bulk, melt-processed superconductors. By means of transmission electron and polarized light microscopy, we found that two types of 211 particles are formed; large NEG-211 and submicron-sized particles containing mostly Gd in the rare earth site are formed which can act as effective flux pinning sites. The critical current density at zero field increases monotonously as a function of the NEG-211 concentration, but the secondary peak vanishes above 40 mol % 211 addition. As a result, a critical current density of 68 000 A cm-2 at 77 K and 2.5 T applied field is achieved with at 40 mol % 211 additions.

Original languageEnglish
Pages (from-to)91-93
Number of pages3
JournalApplied Physics Letters
Volume76
Issue number1
Publication statusPublished - 2000 Jan 3
Externally publishedYes

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augmentation
critical current
current density
flux pinning
polarized light
rare earth elements
microscopy
electrons

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Enhancement of Jc by 211 particles in ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy melt-processed superconductors",
abstract = "(Nd0.33Eu0.33Gd0.33)2BaCuO 5 (NEG-211) particles are added to ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy (NEG) bulk, melt-processed superconductors. By means of transmission electron and polarized light microscopy, we found that two types of 211 particles are formed; large NEG-211 and submicron-sized particles containing mostly Gd in the rare earth site are formed which can act as effective flux pinning sites. The critical current density at zero field increases monotonously as a function of the NEG-211 concentration, but the secondary peak vanishes above 40 mol {\%} 211 addition. As a result, a critical current density of 68 000 A cm-2 at 77 K and 2.5 T applied field is achieved with at 40 mol {\%} 211 additions.",
author = "Muralidhar Miryala and Koblischka, {Michael Rudolf} and P. Diko and Masato Murakami",
year = "2000",
month = "1",
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language = "English",
volume = "76",
pages = "91--93",
journal = "Applied Physics Letters",
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T1 - Enhancement of Jc by 211 particles in ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy melt-processed superconductors

AU - Miryala, Muralidhar

AU - Koblischka, Michael Rudolf

AU - Diko, P.

AU - Murakami, Masato

PY - 2000/1/3

Y1 - 2000/1/3

N2 - (Nd0.33Eu0.33Gd0.33)2BaCuO 5 (NEG-211) particles are added to ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy (NEG) bulk, melt-processed superconductors. By means of transmission electron and polarized light microscopy, we found that two types of 211 particles are formed; large NEG-211 and submicron-sized particles containing mostly Gd in the rare earth site are formed which can act as effective flux pinning sites. The critical current density at zero field increases monotonously as a function of the NEG-211 concentration, but the secondary peak vanishes above 40 mol % 211 addition. As a result, a critical current density of 68 000 A cm-2 at 77 K and 2.5 T applied field is achieved with at 40 mol % 211 additions.

AB - (Nd0.33Eu0.33Gd0.33)2BaCuO 5 (NEG-211) particles are added to ternary (Nd0.33Eu0.33Gd0.33)Ba2Cu 3Oy (NEG) bulk, melt-processed superconductors. By means of transmission electron and polarized light microscopy, we found that two types of 211 particles are formed; large NEG-211 and submicron-sized particles containing mostly Gd in the rare earth site are formed which can act as effective flux pinning sites. The critical current density at zero field increases monotonously as a function of the NEG-211 concentration, but the secondary peak vanishes above 40 mol % 211 addition. As a result, a critical current density of 68 000 A cm-2 at 77 K and 2.5 T applied field is achieved with at 40 mol % 211 additions.

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