Regensburg 2016 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 16: Magnetization and Demagnetization Dynamics I
MA 16.3: Vortrag
Dienstag, 8. März 2016, 10:00–10:15, H34
Topological Spin Textures as Emitters for Multidimensional Spin Wave Modes — Volker Sluka1, Markus Weigand2, Attila Kakay1, Katrin Schultheiss1, Artur Erbe1, Vasyl Tyberkevych3, Andrei Slavin3, Alina Deac1, Jürgen Lindner1, Jürgen Fassbender1, •Jörg Raabe4, and Sebastian Wintz4,1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Max-Planck-Institut für Intelligente Systeme, Stuttgart, Germany — 3Oakland University, Rochester, USA — 4Paul Scherrer Institut, Villigen, Switzerland
The investigation of propagating spin waves is a key topic of magnetism research [1]. For the excitation of spin waves with short wavelengths, it was typically necessary to either use transducers with sizes on the order of the desired wavelengths (striplines or point-contacts) or to generate those spin waves parametrically by a double-frequency spatially uniform microwave signal [2]. Only recently, a novel mechanism for the local excitation of spin waves has been discovered, which overcomes the wavelength limit given by the minimum patterning size. This method utilizes the translation of natural topological defects, namely the gyration of spin vortex cores [3]. In the present contribution we will show that in a vortex pair system with uniaxial magnetic anisotropy, spin waves of even different symmetries and dimensionalities can be excited. [1] Madami M. et al., Nat. Nanotechnol. 6, 635, (2011). [2] Gurevich A. G. and Melkov G. A., Magnetic Oscillations and Waves, CRC New York, (1996). [3] Wintz S. et al., Joint Intermag/MMM Abstract AC-07, (2013).