SKM 2023 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 23: Poster Magnetism I
MA 23.73: Poster
Dienstag, 28. März 2023, 17:00–19:00, P1
Frequency multiplication by collective nanoscale spin-wave dynamics — •Chris Koerner1, Rouven Dreyer1, Martin Wagener1, Niklas Liebing1, Hans G. Bauer2, and Georg Woltersdorf1,3 — 1Institute of Physics, Martin Luther University Halle-Wittenberg, Von-Danckelmann-Platz 3, 06120 Halle, Germany — 2Jahnstrasse 23, 96050 Bamberg, Germany. — 3Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany
Frequency multiplication is a process in modern electronics in which harmonics of the input frequency are generated in nonlinear electronic circuits. Devices based on the propagation and interaction of spin waves are a promising alternative to conventional electronics. The characteristic frequency of these excitations is in the gigahertz (GHz) range and devices are not readily interfaced with conventional electronics. Here, we locally probe the magnetic excitations in a soft magnetic material by optical methods and show that megahertz-range excitation frequencies cause switching effects on the micrometer scale, leading to phase-locked spin-wave emission in the GHz range. Indeed, the frequency multiplication process inside the magnetic medium covers six octaves and opens exciting perspectives for spintronic applications, such as all-magnetic mixers or on-chip GHz sources.
C. Koerner et al., Science 375, 6585 (2022)