Dresden 2017 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 64: Poster 1

MA 64.53: Poster

Freitag, 24. März 2017, 09:30–13:00, P2-EG

Characterization of single YIG microstructures using Brillouin light scattering microscopy — •Björn Heinz¹, Thomas Meyer¹, Philipp Pirro¹, Thomas Brächer^1,3, Carsten Dubs², Oleksii Surzhenko², Burkard Hillebrands¹, and Andrii Chumak¹ — ¹Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — ²INNOVENT e.V. Technologieentwicklung Jena, 07745 Jena, Germany — ³Université Grenoble Alpes, CNRS, CEA, INAC-SPINTEC, 38054 Grenoble, France

We investigate the magnetization dynamics in single YIG microstructures. The structures are patterned from a 98 nm thick LPE-grown YIG film and have a square shape with lateral sizes down to 800 nm. By exciting the magnetization dynamics with a microwave field and performing Brillouin light scattering microscopy measurements, different lateral standing modes are observed. Comparing the measurements to micromagnetic simulations, the spin wave modes are identified. Furthermore, a magnetic field dependent determination of the resonance frequency and the linewidth of the fundamental mode is performed. For the subsequent determination of the saturation magnetization and the Gilbert damping parameter of individual microstructures, quantization effects need to be taken into account. The results indicate a small decrease of the saturation magnetization and an increased Gilbert damping which needs to be considered for future investigation of YIG microstructures. This research has been supported by ERC Starting Grant 678309 MagnonCircuit and DFG Grant DU 1427/2-1.