Fig. 5From: Spin-polarized scanning tunneling microscopy with quantitative insights into magnetic probes(Reprinted from [4] with permission from American Physical Society (Copyright 2014))dI/dV hysteresis loops of Co islands measured with a ferromagnetic tip. a CC-STM image of Co islands on Cu(111) (V b = −0.1 V, I set = 1 nA). b Schematic illustration for the spin-STM measurements shown in c and d. Note the tip material configuration. c, dI/dV hysteresis loops at the center of the Co islands A and B marked by the red and black dashed circles, respectively, in a. The red (blue) color is for the measurements on the island A and corresponds to forward (backward) sweep of the magnetic field. The black dashed line presents a dI/dV hysteresis loop of the island B in a. d, Minor hysteresis loop taken at the center of island A, with the sample magnetization M S pointing down as indicatedBack to article page