Fig. 2

Minimum detectable MFM signal allowed by the thermal noise, \(l_{\text {th}}\), as a function of temperature for different distances of separation and (a) \(R_\text {t} = 5\) nm, (b) \(R_\text {t} = 10\) nm, (c) \(R_\text {t} = 15\) nm and (d) \(R_\text {t} = 20\) nm. Filled circles with full lines correspond to DW, while filled triangles with dashed lines hold for skyrmion sample.