NDLI: Critical currents in Al films with a triangular lattice of 1 µm holes

Content Provider	IEEE Xplore Digital Library
Author	Hebard, A. Fiory, A. Somekh, S.
Copyright Year	1965
Abstract	Critical currents have been measured in an Al film perforated with a two-dimensional triangular lattice pattern of holes. A pulsed current technique has been used to determine the interaction between the vortex lattice and the hole lattice as a function of temperature and magnetic field. Enhanced critical currents of the perforated specimen, compared to critical currents of a similar unperforated reference specimen, are a result of the strong pinning forces at the edges of the holes which tend to trap the cores of the vortices in the holes. When the flux density matches the hole density, the coherent operation of the vortex hole coupling forces is observed to withstand a driving force from the applied current which approaches the theoretical maximum current carrying capacity of a superconductor. At low temperatures, fast pulse measurements reveal that the super-normal instability transitions tend to be suppressed by the application of a magnetic field, allowing the determination of the flux flow thresholds at temperatures well below Tc.
Sponsorship	IEEE Magnetics Society
Starting Page	589
Ending Page	592
Page Count	4
File Size	404842
File Format	PDF
ISSN	00189464
Volume Number	13
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1977-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Critical current Lattices Magnetic films Pulse amplifiers Temperature sensors Magnetic field measurement Temperature measurement Magnetic fields Voltage Temperature distribution
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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