J.A. Barker, D. Henderson, et al.
Molecular Physics
Vortex pinning in textured Bi-2212/Ag superconducting tapes was enhanced by randomly oriented columnar defects, formed by GeV proton-induced fission of Bi-nuclei. Studies of J versus time in the range 2-40 K shows that thermally activated current decay decreased greatly. However, temperature-independent quantum tunneling of vortices considerably limits J and its temporal stability for a significant fraction of the finite-Jc region. © 2000 Elsevier Science B. V. All rights reserved.
J.A. Barker, D. Henderson, et al.
Molecular Physics
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