Fig. 1: Structural and magnetic characterization of Fe3Sn2 films.
From: Plethora of tunable Weyl fermions in kagome magnet Fe3Sn2 thin films
a Crystal structure of one unit cell of Fe3Sn2. Blue and white spheres represent Fe and Sn atoms, respectively. b Post-growth RHEED images of Fe3Sn2 thin film along two high-symmetry in-plane directions. c XRD data of the sample showing the SrTiO3 substrate peak and the Fe3Sn2 (0009) peak. d High-resolution STM topograph acquired at the Fe3Sn surface. Inset in d magnifies a small region with the schematic of the kagome structure of Fe3Sn layer superimposed. e STM topograph containing an Fe3Sn–Fe3Sn atomic step. Orange (blue) lines follow the nearest-neighbor Sn atoms in the upper (lower) Fe3Sn layer (See Supplementary Note 2). Solid and dashed lines are parallel to the in-plane a and b lattice vectors, respectively. f Magnetization curves as a function of the magnetic field applied in the ab-plane (green) and along the c-axis (black) after subtracting the magnetic moment from the substrate. Inset in f displays the hysteresis loop near 0 T at 2 K. STM setup conditions: d Iset = 100 pA, Vsample = 100 mV; e Iset = 280 pA, Vsample = 35 mV.
