Regensburg 2022 – scientific programme
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MA: Fachverband Magnetismus
MA 15: Computational Magnetism 2
MA 15.4: Talk
Tuesday, September 6, 2022, 10:15–10:30, H48
Stabilisation of external-magnetic-field-induced magnetisation switching with respect to thermal fluctuations — •Grzegor J. Kwiatkowski1, Mohammad H. A. Badarneh1, and Pavel F. Bessarab1,2 — 1Science Institute of the University of Iceland, Reykjavík, Iceland — 2Department of Physics and Electrical Engineering, Linnaeus University, Kalmar, Sweden
As magnetic memory devices are the cornerstone of data storage, rapid global growth of information transfer creates a pressing need for faster and more energy-efficient memory devices. One of the important directions of research is focused on optimizing the magnetization switching protocols [1,2] showing that both the amplitude of the external pulse as well as the switching time can be significantly reduced in comparison to currently used ones. Before those ideas are implemented one needs to test reliability of the designed optimal pulses when thermal fluctuations are present.
We present the effect of thermal fluctuations on the success rate of magnetization switching induced by an optimized external magnetic field pulse [1]. Furthermore, using perturbation theory and direct numerical simulations we systematically study how to increase the probability of switching by modifying the external pulse depending on the system parameters, temperature and chosen switching time.
[1] Kwiatkowski, G. J. et al. Phys. Rev. Lett., 126(17), 177206
[2] Badarneh, M. H. A. et al. F. Nanosyst.: Phys. Chem. Math., 11(3), 294-300