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A major challenge in next-generation magnetic storage technologies is the efficient and controllable creation and manipulation of magnetic textures. We predict a way to create magnetic domain walls and skyrmions by means of a homogeneous DC current without the need of specialized setups and without requiring any standard “twisting” interactions like Dzyaloshinskii-Moriya or dipole-dipole interactions. This is possible by exploiting a dynamical instability arising by the interplay of current-induced spin-transfer torque and locally engineered anisotropies. The magnetic textures can be created efficiently, controllably and periodically with a period that can be tuned by the applied current strength. We propose specific experimental setups to observe the periodic formation of domain walls and skyrmions.

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Karin Everschor, University of Mainz
Seminar Room 0.03, ETP
Contact: Achim Rosch