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Abstract: We present a procedure to study the switching and the stability of an arrayof magnetic nanoparticles in the dynamical regime. The procedure leads to thecriterion of multi-switching stability to be satisfied in order to have stableswitching. The criterion is used to compare various magnetic-field-inducedswitching schemes, either present in the literature or suggested in the presentwork. In particular, we perform micromagnetic simulations to study themagnetization trajectories and the stability of the magnetization afterswitching for nanoparticles of elliptical shape. We evaluate the stability ofthe switching as a function of the thickness of the particles and the rise andfall times of the magnetic pulses, both at zero and room temperature.Furthermore, we investigate the role of the dipolar interaction and itsinfluence on the various switching schemes. We find that the criterion ofmulti-switching stability can be satisfied at room temperature and in thepresence of dipolar interactions for pulses shaped according to CMOSspecifications, for switching rates in the GHz regime.



Autor: F. Porrati, M. Huth

Fuente: https://arxiv.org/







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