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Start of funding 01.07.2019
Hybrid Spin Wave Platform for Magnonic Devices
Prof. Dr.-Ing.-habil. Markus Becherer
Technische Universität München
Lehrstuhl für Nano- und Quantensensorik
Prof. Dr. Ilya Krivorotov
University of California, Irvine
Department of Physics and Astronomy
Within the scope of this project, we want to fabricate hard-magnetic islands consisting of Co/Pt
multilayers on top of Yttrium Iron Garnet (YIG) thin films.
The emanating dipole fields of the Co/Pt nanomagnets are employed to influence spin wave
propagation in YIG locally.
With this method, diverse magnonic structures can be built and investigated. A prospective
approach is a magnonic crystal,
which is generally classified as a periodic change of the magnetic properties in a spin wave
propagation material.
YIG based magnonic crystals are created with periodic assemblies of those Co/Pt nanomagnets
on top.
A variation of shape, multilayer geometry as well as the distance between the Co/Pt magnets
results in different dipole field profiles
and therefore in a change of the magnonic crystal’s features. Such structures may exhibit
magnonic bandgaps, i.e. frequencies, where spin wave propagation is suppressed. Those
bandgaps can be utilized
for magnonic wave computing, e.g. they can act as spin wave filters.