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Magnetic and microstructure study of bulk (Sm0.33Eu0.33Gd0.33)Ba2Cu3Oy with submicron Gd2BaCuO5 second-phase particles

Published online by Cambridge University Press:  31 January 2011

M. Muralidhar ,
M. Jirsa ,
N. Sakai ,
Y. Wu  and
M. Murakami
M. Muralidhar
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-16-25, Shibaura, Minato-ku, Tokyo 105, Japan
M. Jirsa
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-16-25, Shibaura, Minato-ku, Tokyo 105, Japan
N. Sakai
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-16-25, Shibaura, Minato-ku, Tokyo 105, Japan
Y. Wu
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-16-25, Shibaura, Minato-ku, Tokyo 105, Japan
M. Murakami
Affiliation:
Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-16-25, Shibaura, Minato-ku, Tokyo 105, Japan
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Abstract

We fabricated melt-processed (Sm0.33Eu0.33Gd0.33)Ba2Cu3Oy superconductors with fine Gd2BaCuO5 (Gd-211) particles and studied microstructure and magnetic properties as a function of the Gd-211 content and the initial particle size. Microstructure observation by scanning electron microscopy and transmission electron microscopy confirmed the presence of submicron secondary-phase particles and nanometer-sized RE1+xBa2-xCu3Oy (x ≫ 0) clusters. At 77 K, the critical current densities of 107 and 83 kA/cm2 were achieved at 0 T (self-field) and 2.2 T, respectively (superconducting quantum interference device data).

Type
Articles
Information
Journal of Materials Research , Volume 18 , Issue 5 , May 2003 , pp. 1073 - 1080
Copyright
Copyright © Materials Research Society 2003

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