Fig. 1: Experimental set-up for the magnetic characterization of (3,1,8)-chGNRs on GdAu2.
From: Detecting the spin-polarization of edge states in graphene nanoribbons
a Survey of cGNRs on GdAu2 (SP: -1.5V, 100 pA). b Zoom of the area within the yellow square in (a), STM topography mixed with the double derivative image to enhance the Gd lattice (SP: 1V, 50pA, W tip). c, d Simultaneous topography image and dI/dV spin-polarized map with in-plane sensitive Cr tip (SP: 3V, 50 pA; Vmod = 20 mV rms; B = 0 Tesla). The image contains structural antiphase boundaries (APB) which induce antiferromagnetic coupling among neighbouring domains. e, f Zoom of the region enclosed by the green rectangle in (d) of two different remanent magnetic states (B = 0 T) of the substrate obtained after cycling the field at maximum positive and negative out-of-plane field strength of ± 3 Tesla. This is an example of how we control the magnetic state of the tip-sample system for the subsequent magnetic characterization of the ribbons. g Cartoon model of the entire tip-sample system in (e) and (f) where arrows represent the local magnetic moment. h Constant height dI/dVmap at 2 mV (Vmod = 0.5 mV rms) of the N = 17 ribbon marked in (c) with the same Cr tip (feedback opened at ribbon centre with SP: 50 mV, 300 pA).
