Critical currents in proton-irradiated single-crystal Ba sub 2 YCu sub 3 O sub 7 minus. delta

Irradiation with 3.5 MeV protons creates defects in Ba{sub 2}YCu{sub 3}O{sub 7{minus}{delta}}, which can act as strong pinning sites, comparable to those produced by neutron irradiation. Indeed protons as well as neutrons undergo momentum-transferring collisions that result in atomic displacements;...

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