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

Published online by Cambridge University Press:  15 August 1999

M. Muralidhar ,
M. R. Koblischka  and
M. Murakami
M. Muralidhar
Affiliation:
ISTEC/SRL, Division 3, 1-16-25 Shibaura, Minato-ku, Tokyo 105, Japan
M. R. Koblischka
Affiliation:
ISTEC/SRL, Division 3, 1-16-25 Shibaura, Minato-ku, Tokyo 105, Japan
M. Murakami
Affiliation:
ISTEC/SRL, Division 3, 1-16-25 Shibaura, Minato-ku, Tokyo 105, Japan
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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, J c. TEM observations demonstrate that we could successfully embed submicron-size 211 particles within the NEG-123 matrix. EDX analysis revealed that thesesubmicron-size particles consist Maynly of Gd in the rare earth site. The presence ofsuch 211 particles leads to a dramatic increase of J c in low fields as wellas in the high field region. For NEG-123 with an addition of 40 mol% of NEG-211 acritical current density of 70 000 A/cm2 at 77 K, 2.2 T is observed for the fieldapplied parallel to the c axis.

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Type
Research Article
Information
The European Physical Journal - Applied Physics , Volume 7 , Issue 2 , August 1999 , pp. 99 - 102
Copyright
© EDP Sciences, 1999

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