Regensburg 2013 – scientific programme

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MA: Fachverband Magnetismus

MA 49: Magnetization Dynamics III of 3

MA 49.9: Talk

Friday, March 15, 2013, 11:30–11:45, H22

Nonreciprocal spin waves excitation in perpendicular magnetized Permalloy microstructures — •Florin Ciubotaru, Alexander Serga, Andrii Chumak, and Burkard Hillebrands — FB Physik and Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany

Spin waves in micro- and nanosized magnetic structures have attracted growing attention due to the prospective applications in magnon spintronic devices. For example, the use of phase and amplitude of spin waves as an information carrier in magnetic logic circuits is extensively studied. The control of spin-wave excitation and the manipulation of their propagation characteristics is of crucial importance for the development of such devices. Here we report on micromagnetic simulations [1] of the spin-wave emission from a nanosized antenna in perpendicular magnetized Permalloy microstructures. We show that depending on the film thickness the same antenna exhibit either a symmetric or an asymmetric spin-wave radiation. In addition, the character of the spin-wave emission can be controlled by the excitation frequency at a fixed bias magnetic field. Support from DFG (grant SE-1771/1-2) is gratefully acknowledged. [1] OOMMF open code, M. J. Donahue, and D. G. Porter, Report NISTIR 6376, NIST, Gaithersburg, MD (1999).