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Synthesis of Unidirectionally Solidified Y‐Ba‐Cu‐0 Bulk Superconductors with High Critical Current Densities

Published online by Cambridge University Press:  28 February 2011

E. Yanagisawa ,
S. Kondoh ,
J. Shimoyama ,
J. Kase ,
T. Matsubara  and
T. Morimoto
E. Yanagisawa
Affiliation:
Research Center, Asahi Glass Co. Ltd., 1150 Hazawa, Kanagawa, Yokohama 221, Japan
S. Kondoh
Affiliation:
Research Center, Asahi Glass Co. Ltd., 1150 Hazawa, Kanagawa, Yokohama 221, Japan
J. Shimoyama
Affiliation:
Research Center, Asahi Glass Co. Ltd., 1150 Hazawa, Kanagawa, Yokohama 221, Japan
J. Kase
Affiliation:
Research Center, Asahi Glass Co. Ltd., 1150 Hazawa, Kanagawa, Yokohama 221, Japan
T. Matsubara
Affiliation:
Research Center, Asahi Glass Co. Ltd., 1150 Hazawa, Kanagawa, Yokohama 221, Japan
T. Morimoto
Affiliation:
Research Center, Asahi Glass Co. Ltd., 1150 Hazawa, Kanagawa, Yokohama 221, Japan
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Abstract

(Y,Ho)‐Ba‐Cu‐0 superconductors with the high critical current densities (Jc) in an applied magnetic field have been synthesized by a unidirectional melt solidification method. Melt solidified bulk materials are composed of large plate‐shape (Y,Ho)Ba2Cu3Oy crystals which contain small (∼5 um) particles of (Y.Ho)2BaCuO5. The Jc value of the melt solidified (Y,Ho)‐Ba‐Cu‐0 sample is ∼10000 A/cm2 at 77K, H = IT and this value is much higher than the value of 4200 A/cm2 of the melt solidified Y‐Ba‐Cu‐O sample.

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