Synchrotron-based high-pressure research in materials science Page: 1 of 15
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Analytical Modelling and X-Ray Imaging of Oscillations of a Single
Magnetic Domain Wall
Lars Bocklage,1' * Benjamin Kruger,2' t Peter Fischer,3 and Guido Meier'
'Institut fir Angewandte Physik und Zentrum fur Mikrostrukturforschung,
Universitat Hamburg, Jungiusstrasse 11, 20355 Hamburg
2L Institut fiir Theoretische Physik, Universitdt Hamburg, Jungiusstrasse 9, 20355 Hamburg
3Center for X-Ray Optics, Lawrence Berkeley National Laboratory,
1 Cyclotron Road, Berkeley, CA 94720, USA
(Dated: May 6, 2009)
Abstract
Domain-wall oscillation in a pinnig potential is described analytically in a one dimensional model for
the f eld-driven case. For a proper description the pinning potential has to be extended by nonharmonic
contributions. Oscillations of a domain wall are observed on its genuine time scale by magnetic X-ray
microscopy. It is shown that the nonharmonic terms are present in real samples with a strong restoring
potential. In the framework of our model we gain deep insight into the domain-wall motion by looking at
different phase spaces. The corrections of the harmonic potential can change the motion of the domain wall
signif cantly. The damping parameter of permalloy is determined via the direct imaging technique.
PACS numbers: 68.37.Yz,75.60.Ch,76.50.+g,85.75.-d
*Electronic address: lbocklag@physnet. uni-hamburg. de
tElectronic address: bkrueger@physnet. uni-hamburg. de1
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Synchrotron-based high-pressure research in materials science, article, Date Unknown; (https://digital.library.unt.edu/ark:/67531/metadc930246/m1/1/: accessed April 24, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.