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Berlin 2012 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 91: [MA] Poster II

O 91.6: Poster

Freitag, 30. März 2012, 11:00–14:00, Poster A

Spin-wave propagation in a Co2Mn0.6Fe0.4Si Heusler waveguideThomas Sebastian1,2, •Philipp Pirro1, Thomas Brächer1,2, Alexander A. Serga1, Burkard Hillebrands1, Yusuke Ohdaira3, Hiroshi Naganuma3, Mikihiko Oogane3, and Yasuo Ando31FB Physik und Landesforschungszentrum OPTIMAS, TU Kaiserslautern, 67663 Kaiserslautern, Germany — 2Graduate School Material Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany — 3Departement of Applied Physics, Tohoku University, Sendai, Japan

The class of Cobalt-based full Heusler compounds combines high Curie temperatures and spin polarizations with a lower Gilbert damping than most conventional 3d-ferromagnets [1]. These material parameters make them promising candidates in the emerging field of magnon spintronics. In this concept, information is transferred and processed via magnons - the excitations of the magnetic system - without flow of electronic currents. Here we present the first observation of spin dynamics in a microstructured Heusler waveguide using Brillouin light scattering microscopy. The low magnetic losses estimated by FMR measurements [2] have been confirmed by the increase of the observed propagation distances (up to 80 µ m, with an exponential decay length of at least 10 µ m) compared to the commonly used Ni81Fe19.

We acknowledge financial support by the DFG Research Unit 1464: ASPIMATT.

[1] S. Trudel, J. Phys. D: Appl. Phys. 43, 1930001 (2010).

[2] T. Kubota, Appl. Phys. Lett. 94, 122504 (2009).

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