Determining the Saddle Point in Micromagnetic Models of Magnetization Switching
Gregory Brown, M. A. Novotny, and Per Arne Rikvold
TL;DR
This paper presents a numerical simulation of nanoscale iron magnets to identify the saddle point in magnetization switching using a projective-dynamics method, revealing a linear decrease in saddle point magnetization with temperature.
Contribution
It introduces a finite-temperature micromagnetic simulation combined with a projective-dynamics approach to determine the saddle point in magnetization switching.
Findings
Saddle point magnetization decreases linearly with temperature
Finite-temperature effects are significant in nanoscale magnetization switching
The method provides a new way to analyze thermal effects in micromagnetic models
Abstract
A numerical model of single-domain nanoscale iron magnets fabricated using scanning-microscope-assisted chemical vapor deposition is simulated using finite-temperature micromagnetics. A Projective-dynamics method is used to determine the magnetization at the saddle point as a function of temperature. This magnetization is found to decrease linearly as the temperature is raised.
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Taxonomy
TopicsMagnetic properties of thin films · Magnetic Properties and Applications · Theoretical and Computational Physics