Fig. 3: Reversible writing/deleting of magnetic skyrmions.
From: Reversible writing/deleting of magnetic skyrmions through hydrogen adsorption/desorption
a SPLEEM images of perpendicularly magnetized domains in Ni/Co/Pd/W(110), showing reversible skyrmion writing/deleting over three hydrogen ON/OFF cycles (indicated by the red, orange and yellow arrows), scale bar is 200 nm. b Similar time sequence as panel a, here on a +Mz domain (blue), showing reversible writing/deleting of two skyrmions (green and blue arrows), scale bar is 200 nm. c Time-dependent Mz evolution at the center of skyrmions highlighted by the arrows in panels a and b over three hydrogen ON/OFF cycles, showing reversible skyrmion switching between ferromagnetic state (F on y axis) and skyrmion state (S on y axis). Color of the curve corresponds to the arrow color. d Mz profile of a skyrmion (see inset) and its deconvolved profile in ideal imaging condition. e Histograms of skyrmion diameters (lower scale image-apparent, upper scale deconvolved measurements) over three cycles of H ON/OFF.
