Shift of geometrically localized magnetic walls in thin films under a magnetic field - art. no. 184412

Citation
N. Garcia et al., Shift of geometrically localized magnetic walls in thin films under a magnetic field - art. no. 184412, PHYS REV B, 6418(18), 2001, pp. 4412
Citations number
22
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
0163-1829 → ACNP
Volume
6418
Issue
18
Year of publication
2001
Database
ISI
SICI code
0163-1829(20011101)6418:18<4412:SOGLMW>2.0.ZU;2-1
Abstract
We present a theory for the action of magnetic field on magnetic domain wal ls at constrictions in thin films and show that the wall shifts from the ce nter of the constriction to a controlled distance. where a decrease of the magnetostatic energy compensates for an increase of the surface wall energy . We also find that the walls are fixed by local geometric inhomogeneities and that growth steps on the surface of thin films cause strong coercitive fields. These studies have important consequences in spintronic application s. in particular, for development of high-speed magnetic switches.