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Weak Pinning Centers in Proton Irradiated YBCO Single Crystals
Published online by Cambridge University Press: 28 February 2011
Abstract
Observed magnetic Jc enhancement in a 3.4 MeV proton-irradiated Y1Ba2Cu3O7-δ (YBCO) single crystal are shown to be intimately linked with a kind of weak pinning centers. Applied magnetic field transforms weak centers into the normal state or pinning centers, which then cause pinning enhancement. Strong pinning anisotropy of the radiation induced weak center can be explained very well by the size anisotropy of a superconducting unit cell and a flux line, or the coherence length.
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- Copyright © Materials Research Society 1992