Projective Dynamics in Realistic Models of Nanomagnets

TL;DR

This paper investigates the free-energy extrema involved in magnetization reversal in a realistic iron nanopillar model using projective dynamics, demonstrating feasible computation of metastable states despite the system's complexity.

Contribution

It applies the projective dynamics method to a detailed nanomagnet model, showing that meaningful results can be obtained within realistic computational time.

Findings

Feasible computation of metastable states in complex nanomagnet models

Validation of fine-grained discretization for realistic time scales

Insights into magnetization-reversal free-energy landscape

Abstract

The free-energy extrema governing the magnetization-reversal process for a model of an iron nanopillar are investigated using the projective dynamics method. Since the time evolution of the model is computationally intensive, one could question whether sufficient statistics can be generated, with current resources, to evaluate the position of the metastable configuration. Justification for the fine-grained discretization of the model that we use here is given, and it is shown that tractable results can be obtained for this system on realistic time scales.