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4 October 2024 Magnon modes and magnetochiral effects in 3D magnonic crystals, ferromagnetic nanotubes, and screws fabricated by atomic layer deposition
Dirk Grundler
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Proceedings Volume PC13119, Spintronics XVII; PC1311914 (2024) https://doi.org/10.1117/12.3028443
Event: Nanoscience + Engineering, 2024, San Diego, California, United States
Abstract
Magnons can serve as information carriers and for signal transmission in nanoscale on-chip microwave electronics operating up to ultrahigh frequencies. They allow for in particular charge-free signal processing and logic in free-form 3D nanoarchitectures. However experiments on magnons in 3D nanoarchitectures are at their infancy due to a technology gap in large-scale nanofabrication. We have optimized the industrially relevant atomic layer deposition (ALD) of ferromagnetic metals and achieved conformal coatings consisting of either Ni or Ni80Fe20 with unprecedented qualities. They allow us to produce free-form 3D ferromagnetic nanostructures consisting of individual or interconnected tubular ferromagnetic shells which are curved in all three spatial directions. We produce 3D nanostructures with large footprints on either semiconductor nanotemplates or polymeric networks produced by two-photon lithography. We report on the local spectroscopy and micromagnetic simulations addressing the distinct magnon modes that we observe in tubes, screws and 3D woodpile nanoarchitectures consisting of either Ni or Ni80Fe20 shells.
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Dirk Grundler "Magnon modes and magnetochiral effects in 3D magnonic crystals, ferromagnetic nanotubes, and screws fabricated by atomic layer deposition", Proc. SPIE PC13119, Spintronics XVII, PC1311914 (4 October 2024); https://doi.org/10.1117/12.3028443
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KEYWORDS
Magnons
Atomic layer deposition
Ferromagnetics
Crystals
Nanolithography
Nanotubes
Nickel
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