Our team has made significant strides in understanding the underlying physics of spin waves in integrated devices at millikelvin temperatures. Through our research, we have successfully demonstrated for the first time the propagation of spin waves in a nanometer-thin ferrimagnet called yttrium-iron-garnet at ultra-low temperatures, using an advanced all-electrical spectroscopy method to excite and detect these waves. We have discovered and revealed the role of paramagnetic gadolinium-gallium-garnet, which modifies crystallographic anisotropy and, while partially magnetised at low temperatures, induces a strongly non-uniform stray field. Having this knowledge, we have designed, fabricated and tested prototypes of the 3-TD within the yttrium-iron-garnet nanowaveguide of cross-section down to fifty-nanometer and three terminals suitable for exciting, manipulating and detecting spin waves.
Our findings have been disseminated in over 20 conferences, workshops, and general scientific presentations. The OMNI project and its partner projects have resulted in multiple peer-reviewed journal publications, with three already published, one proceeding, two under consideration, and four in preparation. Two doctoral, two Master's and two Bachelor’s students were involved in the investigations. Our team remains committed to advancing our understanding of spin waves and their potential applications. Our ground-breaking research will excel in the quantum magnonic research field, and we are excited to continue sharing our findings with the scientific community.
