Homogeneous distribution of 211 secondary-phase particles in single-grain melt-grown (Nd,Eu,Gd)Ba2Cu3O7 bulk

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5 Citations (Scopus)

Abstract

The microstructural features of the (Nd,Eu,Gd)Ba2Cu3O7 (NEG) bulks were studied by optical microscopy in polarized light. The quantitative microstructural data were obtained using the image processing system, Image-Pro Plus. Unlike YBa2Cu3Oy, melt-processed bulks, the NEG bulk superconductors prepared by oxygen-controlled-meltgrowth process do not exhibit macroscopic 211 secondary-phase inhomogeneity due to 211 particle pushing. The lowering of interface energy and increase of melt viscosity are suggested to be responsible for the essential suppression of 211 pushing in NEG melt-grown bulks. This result opens a way to achieve a homogeneous distribution of the current densities in melt-grown bulk superconductors.

Original languageEnglish
Pages (from-to)143-147
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume339
Issue number3
DOIs
Publication statusPublished - 2000 Oct 15
Externally publishedYes

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pushing
Superconducting materials
Light polarization
polarized light
Optical microscopy
image processing
inhomogeneity
Image processing
Current density
retarding
Viscosity
viscosity
current density
Oxygen
microscopy
oxygen
energy

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

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title = "Homogeneous distribution of 211 secondary-phase particles in single-grain melt-grown (Nd,Eu,Gd)Ba2Cu3O7 bulk",
abstract = "The microstructural features of the (Nd,Eu,Gd)Ba2Cu3O7 (NEG) bulks were studied by optical microscopy in polarized light. The quantitative microstructural data were obtained using the image processing system, Image-Pro Plus. Unlike YBa2Cu3Oy, melt-processed bulks, the NEG bulk superconductors prepared by oxygen-controlled-meltgrowth process do not exhibit macroscopic 211 secondary-phase inhomogeneity due to 211 particle pushing. The lowering of interface energy and increase of melt viscosity are suggested to be responsible for the essential suppression of 211 pushing in NEG melt-grown bulks. This result opens a way to achieve a homogeneous distribution of the current densities in melt-grown bulk superconductors.",
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T1 - Homogeneous distribution of 211 secondary-phase particles in single-grain melt-grown (Nd,Eu,Gd)Ba2Cu3O7 bulk

AU - Diko, P.

AU - Miryala, Muralidhar

AU - Koblischka, Michael Rudolf

AU - Murakami, Masato

PY - 2000/10/15

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N2 - The microstructural features of the (Nd,Eu,Gd)Ba2Cu3O7 (NEG) bulks were studied by optical microscopy in polarized light. The quantitative microstructural data were obtained using the image processing system, Image-Pro Plus. Unlike YBa2Cu3Oy, melt-processed bulks, the NEG bulk superconductors prepared by oxygen-controlled-meltgrowth process do not exhibit macroscopic 211 secondary-phase inhomogeneity due to 211 particle pushing. The lowering of interface energy and increase of melt viscosity are suggested to be responsible for the essential suppression of 211 pushing in NEG melt-grown bulks. This result opens a way to achieve a homogeneous distribution of the current densities in melt-grown bulk superconductors.

AB - The microstructural features of the (Nd,Eu,Gd)Ba2Cu3O7 (NEG) bulks were studied by optical microscopy in polarized light. The quantitative microstructural data were obtained using the image processing system, Image-Pro Plus. Unlike YBa2Cu3Oy, melt-processed bulks, the NEG bulk superconductors prepared by oxygen-controlled-meltgrowth process do not exhibit macroscopic 211 secondary-phase inhomogeneity due to 211 particle pushing. The lowering of interface energy and increase of melt viscosity are suggested to be responsible for the essential suppression of 211 pushing in NEG melt-grown bulks. This result opens a way to achieve a homogeneous distribution of the current densities in melt-grown bulk superconductors.

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