Strong field-matching effects in superconducting YBa_ {2} Cu_ {3} O_ {7− δ} films with vortex energy landscapes engineered via masked ion irradiation

Physical review. B, Condensed matter (Impact Factor: 3.66). 11/2011; 85(22). DOI: 10.1103/PhysRevB.85.224502
Source: arXiv


We have developed a masked ion irradiation technique to engineer the energy landscape for vortices in oxide superconductors. This approach associates the possibility to design the landscape geometry at the nanoscale with the unique capability to adjust the depth of the energy wells for vortices. This enabled us to unveil the key role of vortex channeling in modulating the amplitude of the field matching effects with the artificial energy landscape, and to make the latter govern flux dynamics over an unusually wide range of temperatures and applied fields for high-temperature superconducting films.

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