Physics – Condensed Matter – Materials Science
Scientific paper
2010-11-25
Phys. Rev. Lett. 106, 147201 (2011)
Physics
Condensed Matter
Materials Science
16 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.106.147201
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.
Choi Youn-Seok
Kim Sang-Koog
Lee Ki-Suk
Yoo Myoung-Woo
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