Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9834284 | Journal of Magnetism and Magnetic Materials | 2005 | 4 Pages |
Abstract
The switching behavior of 20-nm-thick nanoscale Co ferromagnets has been investigated using the technique of off-axis electron holography. Elements having elliptical, dumbbell, ring and “Pacman” shapes were fabricated on electron-transparent silicon nitride membranes using standard electron-beam lithography and lift-off techniques. Ellipses generally showed linear switching but interactions between closely spaced elements occasionally caused inconsistent switching. Dumbbells, rings and disk-like Pacman shapes developed intermediate vortex states during switching, which caused broad switching fields. Ring-like Pacman shapes had negligible fringing field and switched very rapidly without the formation of any vortex state.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
H. Hu, H. Wang, M.R. McCartney, David J. Smith,