1. The Arrhenius law prefactor in permalloy mesoscale systems.
- Author
-
Delles, J. T. and Dan Dahlberg, E.
- Subjects
- *
ARRHENIUS equation - Abstract
The Arrhenius equation was used to describe the dynamics of two-state switching in mesoscale, ferromagnetic particles. Using square permalloy dots as an idealized two-state switching system, measurements of the prefactor of the Arrhenius law changed by 26 decades over barrier heights from 30 to 700 meV. Measurements of the prefactor ratios for a two well system revealed significant deviations from the common interpretation of the Arrhenius law. The anomalous Arrhenius prefactors and the prefactor ratios can be fitted to a modified model that includes entropic contributions to two-state transitions. Similar considerations are likely for the application of the Arrhenius law to other mesoscale systems. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF