Figure 2

Sample geometry for time-resolved soft X-ray microscopy measurement.

(a) Schematic drawing of sample geometry consisting of Py disks with indicated diameter 2R = 3.0 μm and thickness L = 40 nm and electrode of Ti (5 nm)/Cu (70 nm)/Au (5 nm). The electrode is positioned on the y-axis, thus yielding magnetic fields along the x-axis. The left-upper inset shows an optical microscopy image of the sample wherein Py disks of different diameters 2R = 2.0~6.0 μm are placed. The sample surface was mounted at an angle of 60° with respect to the direction of the incident X-rays. (b) MTXM image of ground vortex state of Py disk of diameter 2R = 3.0 μm and thickness L = 40 nm, obtained at the Fe L₃ edge. The vortex state is characterized by the CCW in-plane and downward core orientations.