Fig. 5: The role of chemisorbed hydrogen and oxygen on magnetic anisotropy and skyrmions on surfaces of other magnetic layers.
From: Reversible writing/deleting of magnetic skyrmions through hydrogen adsorption/desorption
a Hydrogen-induced anisotropy change (Mz, integrated from SPLEEM images in insets) and skyrmion deleting (insets) on surface of 2 ML Ni/3 ML Co/4 ML Pd/W(110). The hydrogen pressure is 1.5 × 10−8 torr. The scale bar in the inset is 500 nm. b, c Oxygen induced anisotropy change (Mz) and skyrmion deleting (insets) on surface of 2 ML Ni/3 ML Co/4 ML Pd/W(110) (panel b) and 0.1 ML Ni/3 ML Co/4 ML Pd/W(110) (panel c). Scale bars in the insets are 500 nm. The oxygen pressure is 2 × 10−9 torr in panel b and 1 × 10−8 torr in panel c.
