Fig. 6: Field-induced trap escape.
From: Thermally active nanoparticle clusters enslaved by engineered domain wall traps
a Sequence of images showing the nanoparticle exchange process between 7 nearest bubbles. The particle exchange between the magnetic bubbles (white disks) and the interstitial region (gray) is induced by reversing the field at t = 2.3 s, Bz → − Bz, and later back to − Bz → Bz at t = 4.6 s. The scale bar is 10 μm, see also VideoS2 in the Supporting Information. The error bars result from the statistical average of different simulation data. b Schematics illustrating the particle positions and the applied field in the (x, z) plane. c Energy landscape of the magnetic lattice calculated at an elevation z = 1.3 μm and for an applied field Bz = 4.3 mT (first and third image) and Bz = − 2.7 mT (second image) as described in “Methods”. Energy minima are colored in blue, maxima in yellow. The red arrows superimposed to the images display the magnetic gradient.
