Magnetic Vortex Core Observation in Circular Dots of Permalloy
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- 11 August 2000
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 289 (5481) , 930-932
- https://doi.org/10.1126/science.289.5481.930
Abstract
Spin structures of nanoscale magnetic dots are the subject of increasing scientific effort, as the confinement of spins imposed by the geometrical restrictions makes these structures comparable to some internal characteristic length scales of the magnet. For a vortex (a ferromagnetic dot with a curling magnetic structure), a spot of perpendicular magnetization has been theoretically predicted to exist at the center of the vortex. Experimental evidence for this magnetization spot is provided by magnetic force microscopy imaging of circular dots of permalloy (Ni 80 Fe 20 ) 0.3 to 1 micrometer in diameter and 50 nanometers thick.Keywords
This publication has 2 references indexed in Scilit:
- Single-Domain Circular NanomagnetsPhysical Review Letters, 1999
- Circular Phase of a Two-Dimensional Ferromagnet with Dipolar InteractionsJournal of the Physics Society Japan, 1997