Robert W. Keyes
Physical Review B
A series of YBa2Cu3O7-δ(YBCO) epitaxial films and crystals were irradiated with energetic heavy ions (Sn30+ or Ag29+ at energy 0.58 GeV) to produce columnar defects of highly disordered material. The irreversibility lines, B*(T), show enhancement due to the increased pinning. However, while B* does not exceed that observed in the highest-Jc as-grown epitaxial thin films, the values approach the proposed vortex melting line determined by a number of experiments on nearly defect-free single crystals. These results are interpreted in terms of the predicted upper limit of pinning energies in anisotropic superconductors, and the thermally-induced decoupling of vortex segments. © 1994.
Robert W. Keyes
Physical Review B
Sharee J. McNab, Richard J. Blaikie
Materials Research Society Symposium - Proceedings
Michael Ray, Yves C. Martin
Proceedings of SPIE - The International Society for Optical Engineering
Heinz Schmid, Hans Biebuyck, et al.
Journal of Vacuum Science and Technology B: Microelectronics and Nanometer Structures