Fiedler, G., Fidler, J., Lee, J., Schrefl, T., Stamps, R.L. , Braun, H.B. and Suess, D. (2012) Direct calculation of the attempt frequency of magnetic structures using the finite element method. Journal of Applied Physics, 111(9), 093917. (doi: 10.1063/1.4712033)
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Publisher's URL: http://dx.doi.org/10.1063/1.4712033
Abstract
A numerical implementation of the transition state theory is presented which can be used to calculate the attempt frequency f<sub>0</sub> of arbitrary shaped magnetic nanostructures. The micromagnetic equations are discretized using the finite element method. The climbing image nudged elastic band method is used to calculate the saddle point configuration, which is required for the calculation of f<sub>0</sub>. Excellent agreement of the implemented numerical model and analytical solutions is obtained for single domain particles. The developed method is applied to compare f<sub>0</sub> for single phase and graded media grains of advanced recording media. f<sub>0</sub> is predicted to be comparable if the maximum anisotropy is the same in these two media types.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Stamps, Professor Robert |
| Authors: | Fiedler, G., Fidler, J., Lee, J., Schrefl, T., Stamps, R.L., Braun, H.B., and Suess, D. |
| College/School: | College of Science and Engineering > School of Physics and Astronomy |
| Journal Name: | Journal of Applied Physics |
| ISSN: | 0021-8979 |
| ISSN (Online): | 1089-7550 |
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