TITLE

Multistable switching due to magnetic vortices pinned at artificial pinning sites

AUTHOR(S)
Rahm, M.; Stahl, J.; Wegscheider, W.; Weiss, D.
PUB. DATE
August 2004
SOURCE
Applied Physics Letters;8/30/2004, Vol. 85 Issue 9, p1553
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Magnetic vortices form the ground state in micron and submicron ferromagnetic disks. By inserting artificial defects (antidots) into a submicron ferromagnetic disk, magnetic vortices can be pinned controllably thus enabling a different way for magnetic switching. We show that by inserting n antidots into a disk magnetization reversal takes place via n-1 jumps of the vortex core between neighboring antidots. This cannot only be used to establish stable two-state switching for n=2, but also to realize a multilevel remanent state with low switching fields.
ACCESSION #
14258796

 

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