Vertical bistable switching of spin vortex in a circular magnetic dot

Citation
N. Kikuchi et al., Vertical bistable switching of spin vortex in a circular magnetic dot, J APPL PHYS, 90(12), 2001, pp. 6548-6549
Citations number
5
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF APPLIED PHYSICS
ISSN journal
00218979 → ACNP
Volume
90
Issue
12
Year of publication
2001
Pages
6548 - 6549
Database
ISI
SICI code
0021-8979(200112)90:12<6548:VBSOSV>2.0.ZU;2-S
Abstract
We have investigated switching behaviors of a spin-vortex core in circular magnetic dots to evaluate them as a new candidate for magnetic memory eleme nts. The spin-vortex core with the lateral dimension of exchange length can take two possible states with spins around the dot center directing either up- or downward. These two spin configurations are very stable and their p olarities can be switched by a large vertical field. The mean switching fie ld reaches about 2.5 kOe for Ni80Fe20 dots with 1 mum in diameter and 80 nm in height. This result could open the way for developing a new bistable ma gnetic memory element utilizing the spin vortex. (C) 2001 American Institut e of Physics.