Submicron size Gd2BaCuO5 particles as source for large critical current densities in (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy

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Abstract

The effect of (Nd0.33Eu0.33Gd0.33)2BaCuO5 (NEG-211), and Gd2BaCuO5 (Gd-211) additions on melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG-123) composites are investigated using a combination of transmission electron microscopy (TEM) and measurements of critical current densities, Jc. TEM observations demonstrate that we could successfully embed submicron-size 211 particles within the NEG-123 matrix. EDX analysis revealed that these submicron-size particles consist mainly of Gd in the rare earth site. The presence of such 211 particles leads to a dramatic increase of Jc in low fields as well as in the high field region. For NEG-123 with an addition of 40 mol% of NEG-211 a critical current density of 70 000 A/cm2 at 77 K, 2.2 T is observed for the field applied parallel to the c axis.

Original languageEnglish
Pages (from-to)99-102
Number of pages4
JournalEPJ Applied Physics
Volume7
Issue number2
Publication statusPublished - 1999 Aug
Externally publishedYes

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critical current
Particle size
current density
Transmission electron microscopy
Rare earths
Energy dispersive spectroscopy
transmission electron microscopy
Composite materials
rare earth elements
composite materials
matrices

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

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title = "Submicron size Gd2BaCuO5 particles as source for large critical current densities in (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy",
abstract = "The effect of (Nd0.33Eu0.33Gd0.33)2BaCuO5 (NEG-211), and Gd2BaCuO5 (Gd-211) additions on melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG-123) composites are investigated using a combination of transmission electron microscopy (TEM) and measurements of critical current densities, Jc. TEM observations demonstrate that we could successfully embed submicron-size 211 particles within the NEG-123 matrix. EDX analysis revealed that these submicron-size particles consist mainly of Gd in the rare earth site. The presence of such 211 particles leads to a dramatic increase of Jc in low fields as well as in the high field region. For NEG-123 with an addition of 40 mol{\%} of NEG-211 a critical current density of 70 000 A/cm2 at 77 K, 2.2 T is observed for the field applied parallel to the c axis.",
author = "Muralidhar Miryala and Koblischka, {Michael Rudolf} and Masato Murakami",
year = "1999",
month = "8",
language = "English",
volume = "7",
pages = "99--102",
journal = "EPJ Applied Physics",
issn = "1286-0042",
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T1 - Submicron size Gd2BaCuO5 particles as source for large critical current densities in (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy

AU - Miryala, Muralidhar

AU - Koblischka, Michael Rudolf

AU - Murakami, Masato

PY - 1999/8

Y1 - 1999/8

N2 - The effect of (Nd0.33Eu0.33Gd0.33)2BaCuO5 (NEG-211), and Gd2BaCuO5 (Gd-211) additions on melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG-123) composites are investigated using a combination of transmission electron microscopy (TEM) and measurements of critical current densities, Jc. TEM observations demonstrate that we could successfully embed submicron-size 211 particles within the NEG-123 matrix. EDX analysis revealed that these submicron-size particles consist mainly of Gd in the rare earth site. The presence of such 211 particles leads to a dramatic increase of Jc in low fields as well as in the high field region. For NEG-123 with an addition of 40 mol% of NEG-211 a critical current density of 70 000 A/cm2 at 77 K, 2.2 T is observed for the field applied parallel to the c axis.

AB - The effect of (Nd0.33Eu0.33Gd0.33)2BaCuO5 (NEG-211), and Gd2BaCuO5 (Gd-211) additions on melt-processed (Nd0.33Eu0.33Gd0.33)Ba2Cu3Oy (NEG-123) composites are investigated using a combination of transmission electron microscopy (TEM) and measurements of critical current densities, Jc. TEM observations demonstrate that we could successfully embed submicron-size 211 particles within the NEG-123 matrix. EDX analysis revealed that these submicron-size particles consist mainly of Gd in the rare earth site. The presence of such 211 particles leads to a dramatic increase of Jc in low fields as well as in the high field region. For NEG-123 with an addition of 40 mol% of NEG-211 a critical current density of 70 000 A/cm2 at 77 K, 2.2 T is observed for the field applied parallel to the c axis.

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