Regensburg 2025 – scientific programme

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MA: Fachverband Magnetismus

MA 31: Poster II

MA 31.40: Poster

Wednesday, March 19, 2025, 17:00–19:30, P1

Manipulation of spin waves in YIG/FM heterostructures — •Julien Schäfer, Akira Lentfert, Björn Heinz, and Philipp Pirro — Department of Physics and Research Center OPTIMAS, RPTU Kaiserslautern-Landau, 67663 Kaiserslautern, Germany

The concept of using spin waves as data carriers is a promising alternative to existing communication standards with the potential for energy efficient data transfer. In magnonics, communication building blocks, such as time-delay lines for phase modulation, can be realized by exploiting the magnetic field-dependent spin-wave group velocities in e.g. yttrium-iron-garnet (YIG). In particular, the spin wave propagation in Damon-Eshbach geometry can be modified by the deposition of an additional ferromagnetic layer, leading to a strong frequency nonreciprocity induced by dipolar interaction. Here, we report an on-chip configurable magnonic frequency filter/phase shifter device consisting of a YIG transmission line with iron stripes deposited on top. These stripes act as Fabry-Pérot (FP) resonators due to the spin-wave reflections at the boundaries. Destructively interfering spin waves are filtered by such a resonator, while the transmitted spin waves accumulate an additional phase due to the altered dispersion relation in the bilayer region. We present micromagnetic studies investigating the tunability of these FP resonators by means of external parameters such as local magnetic fields and the stripe magnetization configuration. This research is funded by the European Union within HORIZON-CL4-2021- DIGITAL-EMERGING-01 (No.101070536, MandMEMS).

Keywords: Spin waves; Magnonic resonators; Phase shifter devices; Frequency filtering