Dominant factors for the pinning enhancement by large artificial partial and complete antidots in superconducting films

Partially (blind) or fully perforated antidots (BADs or ADs, respectively) fabricated by laser lithography and ion beam etching in superconducting YBa2Cu3O7 (YBCO) films possess a cumulative circumference wall surface, which is found to be responsible for pinning vortices and/or magnetic flux, where...

Full description

Saved in:
Bibliographic Details
Published in:Superconductor science & technology 2020-03, Vol.33 (3), p.35004
Main Authors: Jones, A, Al-Qurainy, M, Hamood, A, Lam, S K H, Pan, A V
Format: Article
Language:English
Subjects:
antidot
critical current density
defect wall
flux pinning
YBCO thin films
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Partially (blind) or fully perforated antidots (BADs or ADs, respectively) fabricated by laser lithography and ion beam etching in superconducting YBa2Cu3O7 (YBCO) films possess a cumulative circumference wall surface, which is found to be responsible for pinning vortices and/or magnetic flux, whereby increasing the critical current density (Jc) relative to corresponding plain (unpatterned) films. Using a variety of contrastingly shaped, relatively large 2-5 m BADs and ADs, the Jc of YBCO thin films has been effectively increased within the relatively narrow band of wall surfaces of antidots, independent whether patterns are AD or BAD type. Independence of antidot types indicates that enhancement is insensitive whether magnetic flux is inside the ADs, or vortices are inside the BADs. 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.
ISSN:0953-2048
1361-6668
DOI:10.1088/1361-6668/ab6ec5