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We perform a direct comparison between transition state theory and forward flux sampling as a means to compute collapse rates of metastable magnetic skyrmions. We show that a good agreement… Click to show full abstract
We perform a direct comparison between transition state theory and forward flux sampling as a means to compute collapse rates of metastable magnetic skyrmions. We show that a good agreement is obtained between the two methods. We report variations of the attempt frequency by several orders of magnitude when the applied magnetic field varies weakly, which confirms the existence of a strong entropic contribution to the lifetime of skyrmions. This demonstrates that the knowledge of the rate prefactor, in addition to the internal energy barrier, is essential in order to properly estimate a lifetime.
Journal Title: Physical Review B
Year Published: 2020
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