Nonreciprocal Spin Waves in Nanoscale Hybrid Neel-Bloch-Neel Domain Walls Detected by Scanning X-Ray Microscopy in Perpendicular Magnetic Anisotropic Fe/Gd Multilayers.

ABSTRACT: Spin wave nonreciprocity is crucial for signal processing in magnonic circuits. Domain walls (DWs) have been suggested as channels for nonreciprocal spin waves (magnons) with directional-dependent properties. However, the experimental investigations are challenging due to the low-damping magnetic material with DWs demanded and the nanoscale length scales involved. In this study, scanning transmission X-ray microscopy (STXM) is used to examine coherently-excited magnons when propagating in hybrid Néel-Bloch-Néel DWs in amorphous Fe/Gd multilayers with perpendicular magnetic anisotropy (PMA). Well-ordered lattices of stripe domains and DWs are created through the integration of Cobalt nanowire arrays. Their width is measured to be δ_DW = (60 ± 13) nm. Near 1 GHz magnons are detecte

SUBMITTER: Che P 

PROVIDER: S-EPMC12510291 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature