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Magnetization and Flux Behaviour of YBa2Cu3O7-y Superconducting Rings

Published online by Cambridge University Press:  28 February 2011

Shoichi Yokoyama ,
Kenji Shimohata ,
Toshie Ushijima  and
Tadatoshi Yamada
Shoichi Yokoyama
Affiliation:
Central Research Laboratory, Mitsubishi Electric Corporation, Amagasaki, Hyogo' 661
Kenji Shimohata
Affiliation:
Central Research Laboratory, Mitsubishi Electric Corporation, Amagasaki, Hyogo' 661
Toshie Ushijima
Affiliation:
Central Research Laboratory, Mitsubishi Electric Corporation, Amagasaki, Hyogo' 661
Tadatoshi Yamada
Affiliation:
Central Research Laboratory, Mitsubishi Electric Corporation, Amagasaki, Hyogo' 661
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Abstract

The magnetization and flux creep in YBa2Cu3O7-y +xAg superconducting rings at 77K has been studied experimentally. Decay of the magnetization caused by the induced intergrain current was measured using the ring shaped specimen. The decay in proportion to logarithmic of the time was observed. The pinning potentials (Uo) of about 1.0eV at zero external field and 0. 3eV at 100G were estimated by Anderson and Kim model (1,2). In order to measure the intragrain flux creep, the rings were crushed into powder and pressed to disks without sintering. It was found that the dependence of Uo on external field for the ring was greater than that for the disk.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 169: Symposium M – High Temperature Superconductors: Fundamental Properties and Novel Materials Processing , 1989 , 963
Copyright
Copyright © Materials Research Society 1990

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References

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