High wave vector non-reciprocal spin wave beams

Authors :: Temdie, L.
Castel, V.
Dubs, C.
Pradhan, G.
Solano, J.
Majjad, H.
Bernard, R.
Henry, Y.
Bailleul, M.
Vlaminck, V.
Publication Year :: 2022
Abstract: We report unidirectional transmission of micron-wide spin waves beams in a 55 nm thin YIG. We downscaled a chiral coupling technique implementing Ni80Fe20 nanowires arrays with different widths and lattice spacing to study the non-reciprocal transmission of exchange spin waves down to lambda = 80 nm. A full spin wave spectroscopy analysis of these high wavevector coupled-modes shows some difficulties to characterize their propagation properties, due to both the non-monotonous field dependence of the coupling efficiency, and also the inhomogeneous stray field from the nanowires.<br />Comment: submitted to AIP advances as MMM proceeding article