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Fabrication of Large Melt-textured RE-Ba-Cu-O (RE = Gd, Dy) Superconductors and Their Trapped Magnetic Fields

Published online by Cambridge University Press:  18 March 2011

Shinya Nariki ,
Naomichi Sakai  and
Masato Murakami
Shinya Nariki
Affiliation:
Superconductivity Research Laboratory, ISTEC, Shibaura, Minato-ku, Tokyo, 105-0023, Japan
Naomichi Sakai
Affiliation:
Superconductivity Research Laboratory, ISTEC, Shibaura, Minato-ku, Tokyo, 105-0023, Japan
Masato Murakami
Affiliation:
Superconductivity Research Laboratory, ISTEC, Shibaura, Minato-ku, Tokyo, 105-0023, Japan
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Abstract

We have succeeded in synthesizing RE-Ba-Cu-O (RE = Gd and Dy) bulk superconductors with excellent field trapping properties. Large c-axis oriented single-domain Gd-Ba-Cu-O bulk samples with Ag addition were melt-textured under controlled oxygen partial pressure of 1.0%. The Gd-Ba-Cu-O sample 50 mm in diameter could trap a high flux density of 2.4 T at 77 K. In addition, we measured the trapped field between two Gd-bulks in order to minimize the demagnetizing effect and found that it reached 3.3 T. The single-domain Dy-Ba-Cu-O/Ag bulk 48 mm in diameter was also fabricated in air and its trapped field was 1.9 T at 77 K.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 659: Symposium II – High-Temperature Superconductors-Crystal Chemistry, Processing & Properties , 2000 , II10.7
Copyright
Copyright © Materials Research Society 2001

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References

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