Anisotropy, damping, and coherence of magnetization dynamics in a 10 mu m square Ni81Fe19 element

Barman, A., Kruglyak, V., Hicken, R.J., Kundrotaite, A. and Rahman, M. (2003) Anisotropy, damping, and coherence of magnetization dynamics in a 10 mu m square Ni81Fe19 element. Applied Physics Letters, 82, pp. 3065-3067. (doi:10.1063/1.1572969)

Full text not currently available from Enlighten.

Abstract

We have studied magnetization precession in a square Ni81Fe19 element, of 10 μm width, by time-resolved scanning Kerr effect microscopy. From the frequency of precession, we deduce a fourfold in-plane anisotropy of about 30 Oe at the center of the square. Larger damping of the precession was observed at the center of the element when the static field was applied parallel to a diagonal rather than to an edge of the square. Dynamic images show that the apparent increase in damping is associated with nonuniformity of the dynamic magnetization that is associated with the sample shape.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:UNSPECIFIED
Authors: Barman, A., Kruglyak, V., Hicken, R.J., Kundrotaite, A., and Rahman, M.
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Applied Physics Letters

University Staff: Request a correction | Enlighten Editors: Update this record