3D Magnonic Conduits by Direct Write Nanofabrication

Authors: Sebastian Lamb-Camarena, Fabrizio Porrati, Alexander Kuprava, Qi Wang, Michal Urbánek,
Sven Barth, Denys Makarov, Michael Huth and Oleksandr V. Dobrovolskiy

Nanomaterials 2023, 13, 1926.

Abstract: Magnonics is a rapidly developing domain of nanomagnetism, with application potential in
information processing systems. Realisation of this potential and miniaturisation of magnonic circuits
requires their extension into the third dimension. However, so far, magnonic conduits are largely
limited to thin films and 2D structures. Here, we introduce 3D magnonic nanoconduits fabricated by
the direct write technique of focused-electron-beam induced deposition (FEBID). We use Brillouin
light scattering (BLS) spectroscopy to demonstrate significant qualitative differences in spatially
resolved spin-wave resonances of 2D and 3D nanostructures, which originates from the geometrically
induced non-uniformity of the internal magnetic field. This work demonstrates the capability of
FEBID as an additive manufacturing technique to produce magnetic 3D nanoarchitectures and
presents the first report of BLS spectroscopy characterisation of FEBID conduits.

DOI: https://doi.org/10.3390/nano13131926