Projective Dynamics Analysis of Magnetization Reversal
G. Brown (ORNL, Fla. St. Univ.), M.A. Novotny (Miss. St. Univ.), P.A., Rikvold (Fla. St. Univ.)
TL;DR
This paper applies the Projective Dynamics method to analyze magnetization reversal in nanoscale magnetic pillars, revealing the roles of free-energy barriers and entropy in the reversal process.
Contribution
It demonstrates how the Projective Dynamics method can identify metastable and saddle point magnetizations and quantify free-energy barriers in nanoscale magnetic systems.
Findings
Entropy significantly contributes to the free-energy barrier.
The method accurately determines metastable and saddle point magnetizations.
Free-energy barriers influence reversal time scales.
Abstract
The computational Projective Dynamics method is used to analyze simulations of magnetization reversal in nanoscale magnetic pillars. It is shown that this method can be used to determine the magnetizations corresponding to the metastable minimum and saddle point in the free energy, and the free-energy barrier associated with those points. For the nanopillars studied here, entropy is found to provide a significant contribution to the free-energy barrier which determines the reversal time scale.
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