Speaker
Korbinian Baumgaertl
(SWITCH edu-ID)
Description
Magnonic crystals (MCs) allow for tailoring the dispersion relation of spin waves (SWs) in nanopatterned ferromagnets. Local defects in MCs are expected to add further functionality. We prepared 1D MCs consisting of bistable magnetic stripes separated by sub-100 nm air gaps. By adjusting the magnetic history, we programmed ordered magnetic states with single stripes of opposed magnetization. We studied the influence of these defects on propagating SWs via broadband microwave spectroscopy and phase-resolved focused Brillouin light scattering microscopy. Depending on a bias magnetic field, we observed SW attenuation and phase shift cause by the magnetic defects. We thank for funding by SNSF via grant 163016.
Author
Korbinian Baumgaertl
(SWITCH edu-ID)
Co-authors
Sho Watanabe
(SWITCH edu-ID)
Dirk Grundler
(EPFL)
