Fig. 2
From: Imaging of super-fast dynamics and flow instabilities of superconducting vortices
Magnetic imaging of stationary and fast moving vortices in Pb film at 4.2 K. a–d B z(x, y) SQUID-on-tip images of vortex configurations at I = 0 for different values of applied field B a = 2.7 a,b, 5.4 c, and 9.0 mT d. e–h Images acquired at the verge of vortex motion at I ≲ I c, at B a = 2.7 mT and I = 16 mA e,f, B a = 5.4 mT, I = 12.2 mA g, and B a = 9.0 mT, I = 6.0 mA h. i–l Images of onset of vortex flow at I ≳ I c at B a = 2.7 mT, I = 18.9 mA i,j, B a = 5.4 mT, I = 12.4 mA k, and B a = 9.0 mT, I = 9.1 mA l. m–p Vortex flow patterns at the highest sustainable current with B a = 2.7 mT, I = 20.9 mA m,n, B a = 5.4 mT, I = 16.2 mA o, and B a = 9.0 mT, I = 11.8 mA p. The color scale represents the out-of-plane field B z(x, y) with span of 1.8 b, 2.5 c, 3.0 d, 2.9 f, 3.2 g, 3.4 h, 3.1 j, 3.4 k, 3.4 l, 3.1 n, 3.6 o, and 2.8 mT p. All 2D images are 12 × 12 µm2, pixel size 40 nm, and acquisition time 240 s/image. The scale bar is 3 µm. The top row shows zoomed-in 3D representation of B z(x, y) in the corresponding dashed areas marked in the second row. Supplementary Movies 1–4 for full set of images
