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arXiv · 1011.5625

Edge-Soliton-Mediated Vortex-Core Reversal Dynamics

Ki-Suk Lee·Myoung-Woo Yoo·Youn-Seok Choi·Sang-Koog Kim
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Abstract

We report a new reversal mechanism of magnetic vortex cores in nanodot elements driven by out-of-plane currents, occurring through two coupled edge-solitons via dynamic transformations between magnetic solitons of different topological charges. This mechanism differs completely from the well known switching process mediated by the creation and annihilation of vortex-antivortex pairs in terms of the associated topological solitons, energies, and spin-wave emissions. Strongly localized out-of-plane gyrotropic fields induced by the fast motion of the two coupled edge-solitons enable a magnetization dip that plays a crucial role in the formation of the reversed core magnetization. This work provides a new physical insight into the dynamic transformations of magnetic solitons in nanoelements.

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Ki-Suk Lee, Myoung-Woo Yoo, Youn-Seok Choi, Sang-Koog Kim. 2010-11-25. Edge-Soliton-Mediated Vortex-Core Reversal Dynamics. https://doi.org/10.1103/physrevlett.106.147201

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