Regensburg 2019 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 8: Magnonics

MA 8.7: Vortrag

Montag, 1. April 2019, 16:30–16:45, H52

Construction and investigation of spin wave lenses — •Philipp Geyer¹, Rouven Dreyer¹, and Georg Schmidt^1,2 — ¹Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle (Saale), Germany — ²Interdisziplinäres Zentrum für Materialwissenschaften, Martin-Luther-Universität Halle-Wittenberg, Nanotechnikum Weinberg, 06120 Halle (Saale), Germany

Magnonics is a promising field to realize low energy information transmission and processing, just by excitation of the spin lattice and not by moving electrons. It has been shown experimentally, that spin waves passing through a lateral thickness variation in a magnetic thin film obey snell's law [1]. So, a controlled change of the dispersion parameters like film thickness or magnetic field can be used to focus a plane spin wave [2]. We present two different types of spin wave lenses that are realized by lateral patterning of thin film Yttrium-Iron-Garnet (YIG) fabricated by room temperature pulsed laser deposition and subsequent annealing [3]. Both types of lenses are designed for spin waves in Damon-Eshbach geometry. We investigate their functionality by micromagnetic simulations with mumax3 [4] and experimentally with spatially and time resolved magneto-optical Kerr effect (TR-MOKE) and ferromagnetic resonance (FMR) measurements.

[1] J. Stigloher et al., Phys. Rev. Lett. 117, 037204 (2016) [2] J. Toedt et al., Scientific Reports 6, 33169 (2016) [3] C. Hauser et al., Scientific Reports 6, 20827 (2016) [4] A. Vansteenkiste et al., AIP Advances 4, 107133 (2014)