TITLE

Magnonic spin-wave modes in CoFeB antidot lattices

AUTHOR(S)
Ulrichs, Henning; Lenk, Benjamin; Münzenberg, Markus
PUB. DATE
August 2010
SOURCE
Applied Physics Letters;8/30/2010, Vol. 97 Issue 9, p092506
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In this paper time-resolved magneto-optical Kerr effect experiments on structured CoFeB films are presented. The geometries considered are two dimensional square lattices of micrometer-sized antidots, fabricated by a focused ion beam. The spin-wave spectra of these magnonic crystals show a precessional mode, which can be related to a Bloch state at the zone boundary. Additionally, another magnetic mode of different nature appears, whose frequency displays no dependence on the externally applied magnetic field. These findings are interpreted as delocalized and localized modes, respectively.
ACCESSION #
53421656

 

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