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MA: Fachverband Magnetismus

MA 5: Magnetization/Demagnetization Dynamics

MA 5.2: Vortrag

Montag, 20. März 2017, 09:45–10:00, HSZ 401

Modeling of ultrafast magnetization dynamics in synthetic ferrimagnets — •Stefan Gerlach¹, Laszlo Oroszlany², Denise Hinzke¹, Steffen Sievering¹, Sönke Wienholdt¹, Laszlo Szunyogh², and Ulrich Nowak¹ — ¹Fachbereich Physik, Universität Konstanz, D-78457 Konstanz, Germany — ²Department of Theoretical Physics, Budapest University of Technology and Economics, Budafoki ut 8., HU-1111 Budapest, Hungary

Based on numerical simulations, we demonstrate thermally induced magnetic switching in synthetic ferrimagnets composed of multilayers of rare earths and transition metals. Our findings show that deterministic magnetization reversal occurs above a certain threshold temperature if the ratio of transition metal atoms to rare earth atoms is sufficiently large. Surprisingly, the total thickness of the multilayer system has little effect on switching. We further provide a simple argument to explain the temperature dependence of the reversal process.