Speaker
Description
Spin waves (magnons) are collective spin excitations in magnetically ordered materials. If exhibiting sub-100 nm wavelength they could become the information carrier of future non charge-based information technology. Due to wavelength mismatch interfacing magnons with microwaves is however challenging. We investigate ferrimagnetic nanoparticles as possible magnon nanoemitters. For this we prepared a colloidal suspension of hexaferrite nanopowder with deionized water and deposited it via drop-casting on a yttrium iron garnet (YIG) film. Using integrated microwave antennas we investigate the coupling between nanoparticles (with a diameter of a few 10 nm) and magnons in YIG. Our spectra suggest an inhomogeneous broadening which is enhanced due to scattering at the deposited nanoparticles.