Continual improvements to superconducting devices is a fundamental requirement for optimised operation. Using a variety of contrastingly shaped, relatively large 2–5 µm fully (antidot-AD) and partially etched (blind) holes, the Jc of YBCO thin films has been effectively increased. The enhancement to Jc is present within the relatively narrow band of wall surfaces of ADs, independent of whether patterns were ADs or the blind AD type. Independence of AD types indicates that enhancement is insensitive whether magnetic flux is inside the ADs, or vortices are inside the blind holes. Within this AD wall surface band region a clear shape dependence also emerges. This finding may also provide a guide for superconducting devices requiring maximal Jc and reduced associated vortex movement noise.
Continuing the trend of increasing the Jc of YBCO thin films via vortex pinning, a novel technique was proposed and implemented. The new flux pinning technique involves ion beam etching specific locat
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