Figure 1
From: Reconfigurable superconducting vortex pinning potential for magnetic disks in hybrid structures
(a) Local magnetic induction as a function of in-plane field measured with the Hall probe parked near the centre of a Py disk. Inset shows an AFM image of the array of 1 μm disks. (b) SHPM image of the Py disk array at 77 K with a colorscale of 0.8 G. Also shown is an expanded view of one 1 μm Py disk. OOMMF simulations of the perpendicular magnetic stray field component 500 nm above (c) a 1 μm diameter circular disk without anisotropy, (d) an elliptical disk with major axis (y-axis) of 1.04 μm and minor axis (x-axis) of 1 μm without magnetocrystalline anisotropy, (e) a 1 μm diameter circular disk with uniaxial anisotropy constant K1 = 500 J/m3 and (f) a 1 μm diameter circular disk with uniaxial anisotropy constant K1 = 1.5 × 103 J/m3. The blue arrows represent the simulated magnetisation on the structure surface.
