Precessional dynamics in microarrays of nanomagnets
Kruglyak, V.V.; Barman, A.; Hicken, R.J.; et al.Childress, J.R.; Katine, J.A.
Date: 28 April 2005
Article
Journal
Journal of Applied Physics
Publisher
American Institute of Physics
Publisher DOI
Abstract
Time resolved scanning Kerr microscopy has been used to study the response of square Ni88Fe12/Co80Fe20 bilayer elements to a pulsed magnetic field. Measurements were performed upon a square element of 6000 nm size and upon 64, 120, 220, 425, and 630 nm square elements that formed square arrays of about 4000 nm total size. While the ...
Time resolved scanning Kerr microscopy has been used to study the response of square Ni88Fe12/Co80Fe20 bilayer elements to a pulsed magnetic field. Measurements were performed upon a square element of 6000 nm size and upon 64, 120, 220, 425, and 630 nm square elements that formed square arrays of about 4000 nm total size. While the frequency of precession of the magnetization of the 6000 nm element could be described with a macrospin model, the frequencies observed in the arrays of submicron size elements differed from the macrospin prediction. This observation may be understood in terms of the increasing nonuniformity of the demagnetizing field as the element aspect ratio is decreased.
Physics and Astronomy
Faculty of Environment, Science and Economy
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