Nonreciprocal spin-wave propagation in anisotropy-graded iron films prepared by nitrogen implantationRemoveL. Christienne, J. Jiménez-Bustamante, P. Rovillain, M. Eddrief, Y. Zheng, F. Fortuna, M. Marangolo, M. Madami, R.A. Gallardo, P. Landeros, and S. TacchiPhys. Rev. Applied 24, 064040 (2025)
