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• W2807845546 abstract "The dynamics of magnetic domain walls along ferromagnetic strips with spatially modulated perpendicular magnetic anisotropy is theoretically studied by means of micromagnetic simulations. Ferromagnetic layers with a periodic sawtooth profile of the anisotropy depict a well-defined set of energy minima where the walls are pinned in the absence of external stimuli, and favor the unidirectional propagation of domain walls. The performance of the current-driven domain wall motion along these ratchet-like systems is compared to the field-driven case. Our study indicates that the current-driven domain wall motion exhibits significant improvements with respect to the field-driven case in terms of bit shifting speed and storage density, and therefore, it is suggested for the development of novel devices. The feasibility of these current-driven ratchet devices is studied by means of realistic micromagnetic simulations and supported by a one-dimensional model updated to take into account the periodic sawthooth anisotropy profile. Finally, the current-driven domain wall motion is also evaluated in systems with a triangular modulation of the anisotropy designed to promote the bidirectional shifting of series of walls, a functionality that cannot be achieved by magnetic fields." @default.
• W2807845546 created "2018-06-21" @default.
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• W2807845546 date "2018-06-13" @default.
• W2807845546 modified "2023-10-14" @default.
• W2807845546 title "Current-driven domain wall motion along ferromagnetic strips with periodically-modulated perpendicular anisotropy" @default.
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• W2807845546 doi "https://doi.org/10.1063/1.5036601" @default.
• W2807845546 hasPublicationYear "2018" @default.
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