Fig. 1: Hydrogen-induced magnetic anisotropy in Ni/Co/Pd/W system.
From: Reversible writing/deleting of magnetic skyrmions through hydrogen adsorption/desorption
a Sketch of the sample structure. b–d Ni thickness dNi dependent SPLEEM images with out-of-plane sensitivity in Ni/3 ML Co/4 ML Pd/W(110) system, showing evolution of perpendicularly magnetized domains. Scale bar 1 μm. e dNi dependent electron reflectivity spin-asymmetry of perpendicularly magnetized domains. IP, SRT, PMA stand for in-plane, spin reorientation transition and perpendicular magnetic anisotropy, respectively. f–i Hydrogen-induced evolution of domains with out-of-plane sensitivity. Scale bar 1 μm, indicating in-plane anisotropy induced by \(\sim\)0.7 Langmuir hydrogen on 0.3 ML Ni/3 ML Co/4 ML Pd/W(110) (panels g and h), and recovered perpendicularly magnetized domains upon hydrogen desorption (panel i). j Time-dependent switching of out-of-plane magnetization (\(\left|{M}_{{{{{{\rm{z}}}}}}}\right|\)) in one hydrogen ON/OFF cycle.
