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Systematic Behaviors of ab-plane Pinning Variations in a Practical Length Wire Fabricated by the MOD/RABiTS Process

Published online by Cambridge University Press:  21 April 2011

J. Yates Coulter ,
David W. Reagor ,
Jeffrey O. Willis  and
Terry G. Holesinger
J. Yates Coulter
Affiliation:
Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, U.S.A.
David W. Reagor
Affiliation:
Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, U.S.A.
Jeffrey O. Willis
Affiliation:
Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, U.S.A.
Terry G. Holesinger
Affiliation:
Los Alamos National Laboratory, P.O. Box 1663, Los Alamos, NM 87545, U.S.A.
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Abstract

In-field critical current Ic variations, detected using a short sample, angular Ic(77K, H=5.2kOe, Angle) measurement on the ends of a 20 m coated conductor tape fabricated by the MOD / RABiTS process, are shown to be variations in the Ic(H) anisotropy that exist on subcentimeter length scales. A Ic(75 K, H, Angle) study was performed on segments cut from the tape where the power law exponent of the field dependence, α, Ic ∼H−α was calculated for Ic(H, Angle) data. Two extrema behaviors, anisotropic and isotropic, were identified. The isotropic material is shown to outperform the anisotropic material for a wide range of fields and angles at T=26 K.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1254: Symposium L – Recent Advances and New Discoveries in High-Temperature Superconductivity , 2010 , 1254-L05-05
Copyright
Copyright © Materials Research Society 2010

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