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Title: Direct observation of vortex dynamics in superconducting films with regular arrays of defects
Authors: Harada, K ×
Kamimura, O
Kasai, H
Matsuda, T
Tonomura, A
Moshchalkov, Victor #
Issue Date: 1996
Publisher: AMER ASSOC ADVANCEMENT SCIENCE
Series Title: Science vol:274 issue:5290 pages:1167-1170
Conference: date:KATHOLIEKE UNIV LEUVEN,VASTE STOF FYS & MAGNETISME LAB,B-3001 LOUVAIN,BELGIUM
Abstract: The microscopic mechanism of the matching effect in a superconductor, which manifested itself as the production of peaks or cusps in the critical current at specific values of the applied magnetic field, was investigated with Lorentz microscopy to allow direct observation of the behavior of vortices in a niobium thin film having a regular array of artificial defects. Vortices were observed to form regular and consequently rigid lattices at the matching magnetic field, at its multiples, and at its fractions. The dynamic observation furthermore revealed that vortices were most difficult to move at the matching field, whereas excess vortices moved easily.
ISSN: 0036-8075
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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