Science Daily February 23, 2021
Based on a recently developed method that allows the fabrication of freestanding monocrystalline YIG bridges on gadolinium-gallium-garnet, researchers in Germany have developed a process that allows the transfer of monocrystalline yttrium-iron-garnet microstructures onto virtually any kind of substrate. The bridges’ spans are detached from the substrate by a dry etching process and immersed in a watery solution. Using drop-casting, the immersed YIG platelets can be transferred onto the substrate of choice, where the structures finally can be reattached and, thus, be integrated into complex devices or experimental geometries. They demonstrated that the structures retain their excellent magnetic quality, and they were able to measure magnon spectra on a single micrometer-sized yttrium-iron-garnet platelet. The process is flexible in terms of substrate material and shape of the structure. In the future, this approach will allow for types of spin dynamics experiments until now unthinkable…read more. Open Access TECHNICAL ARTICLEÂ
FMR spectra for a frequency of 4 GHz at (a) 5 K and (b) 295 K showing the occurrence of several spin-wave modes in the YIG bridge…Credit: Appl. Phys. Lett. 117, 232401 (2020)