The Arrhenius Law Prefactor in Permalloy Mesoscale Systems
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866910618659848192 |
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| author | Delles, James Dahlberg, E. Dan |
| author_facet | Delles, James Dahlberg, E. Dan |
| contents | 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 meV 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_16129 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | The Arrhenius Law Prefactor in Permalloy Mesoscale Systems Delles, James Dahlberg, E. Dan Materials Science Mesoscale and Nanoscale Physics Statistical Mechanics Applied Physics 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 meV 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. |
| title | The Arrhenius Law Prefactor in Permalloy Mesoscale Systems |
| topic | Materials Science Mesoscale and Nanoscale Physics Statistical Mechanics Applied Physics |
| url | https://arxiv.org/abs/2409.16129 |