Projective Dynamics Analysis of Magnetization Reversal.pdf
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Projective Dynamics Analysis of
3 Magnetization Reversal
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u Gregory Brown a,∗, M. A. Novotny b , Per Arne Rikvold c
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a Center for Computational Sciences, Oak Ridge National Lab,
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h Oak Ridge, TN 37831-6114, USA
c School of Computational Science and Information Technology,
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m Florida State University, Tallahassee, FL 32306-4120, USA
- b Department of Physics and Astronomy and
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a ERC Center for Computational Sciences,
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s Mississippi State University, MS 39762, USA
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a c Department of Physics, CSIT, and MARTECH,
m Florida State University, Tallahassee, FL 32303-4350, USA
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[ Abstract
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v The computational Projective Dynamics method is used to analyze simulations of
8 magnetization reversal in nanoscale magnetic pillars. It is shown that this method
6 can be used to determine the magnetizations corresponding to the metastable min-
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6 imum and saddle point in the free energy, and the free-energy barrier associated
0 with those points. For the nanopillars studied here, entropy is found to provide
3 a significant contribution to the free-energy barrier which determines the reversal
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m Key words: Magnetization Reversal, Projective Dynamics, Micromagnetics
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: Understanding magnetization reversal is important for technological applica-
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i tions where the magnetic orientation of nanoscale regions must be quickly
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