Figure 1: ZFC magnetic structure of LMO/STO of different thicknesses.
From: Emergent nanoscale superparamagnetism at oxide interfaces
(a–f) 1.5 × 1.5 μm2 scanning SOT images of the magnetic field Bz(x,y) of six samples of different thicknesses N=4 to 200 u.c. at ∼100 nm above the surface acquired at 4.2 K. Scale bar is 200 nm. Note that in (a) through (f) the color scale changes by more than three orders of magnitude. (g) Thickness dependence of the r.m.s. value 
in scanning SOT images (red), global magnetization saturation value Ms (blue), and theoretically calculated Ms (black) which takes into account the SPM and the AFM canting contributions. The inset shows the peak-to-peak field variation Bzptp in SOT images versus N near Nc=5. (h) Schematic scanning SOT microscopy setup.
