Berlin 2015 – wissenschaftliches Programm
TT 15.4: Topical Talk
Montag, 16. März 2015, 16:45–17:15, H 0104
Magnetic Skyrmions and Chiral Spin Structures in Ultra-Thin Films — •Stefan Blügel — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany
Ultrathin magnetic films and heterostructures provide a fantastic playground for the stabilization, manipulation and usage of magnetic skyrmions – topological magnetization solitons – magnetic entities with particle like properties that may open a new vista for spintronics. A crucial quantity for the skyrmion formation is the Dzyaloshinskii-Moriya interaction (DMI), whose presence in thin films could be established in a concerted effort of first-principles theory and spin-polarized scanning tunneling microscopy . It could be shown that the spin-orbit interaction and the structure inversion-asymmetry in these systems result in a DMI that is strong enough to give rise to one-dimensional and two-dimensional lattices  of chiral spin-textures as well as chiral domain walls. Even single skyrmions  could be induced. In retrospect, it is surprising how little is known about the DMI in these metallic systems. In this talk I give some insight into the DMI, the relation to the transport properties of electrons such as the THE and AHE in connection to the spin texture of a skyrmion, and discuss possibilities to manipulate the magnetic interaction to enlarge the materials base to stabilize single skyrmions.
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