Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 23: Non-ultrafast magnetization dynamics

MA 23.4: Vortrag

Mittwoch, 14. März 2018, 10:15–10:30, H 0112

Fabrication and Characterization of individual sub-100 nm YIG Structures using Brillouin Light Scattering Microscopy — •Björn Heinz¹, Thomas Brächer¹, Michael Schneider¹, Philipp Pirro¹, Bert Lägel¹, Carsten Dubs², Oleksii Surzhenko², and Andrii V. Chumak¹ — ¹Fachbereich Physik and Landesforschungszentrum OPTIMAS, Technische Universität Kaiserslautern, 67663 Kaiserslautern, Germany — ²INNOVENT e.V., Technologieentwicklung Jena, 07745 Jena, Germany

Yttrium-iron-garnet (YIG) is a unique material with outstanding magnetic properties such as the lowest known spin-wave damping. It is therefore well suited for the investigation of fundamental spin-wave dynamics and a promising candidate for the application in magnonic circuits and logic devices. In this work, we study the impact of micro- and nanostructuring by means of electron beam lithography and successive ion milling on individual spin-wave waveguides. These structures are fabricated from a 41 nm thin film grown by liquid phase epitaxy (LPE). Their width varies from a few microns down to the sub-100 nm regime. By exciting the magnetization dynamics with a microwave field and performing time resolved Brillouin light scattering (BLS) microscopy measurements we investigate the influence of the structuring process on the magnon lifetime. Additionally the spin-wave mode spectra are extracted by means of thermal BLS measurements. This research has been supported by ERC Starting Grant 678309 MagnonCircuits and DFG Grant DU 1427/2-1.