Figure 4: Anomalous Hall effect device configuration scheme and results.
Current Ix=1 mA is driven along the x-axis, voltage, Vy, is measured along the y-axis at room temperature. (a,b) AHPA-L (AHPA-D) chiral molecules adsorbed onto the conducting channel induce upwards (downwards) magnetization H as denoted by a blue (red) arrow, respectively. (c) The difference between Rxy for a bare sample and Rxy after AHPA-L (blue) and AHPA-D (red) adsorption. The unchanged Hall resistance seen during the time of measurement is the manifestation of a constant induced magnetic field caused by the molecular adsorption. Different devices display different asymmetries although all have a consistent ΔRxy opposite sign for both molecule types. (c, inset) Superconducting quantum interference device with vibrating sample magnetometer M(H) data for the AHPA-L adsorbed and bare configurations of the thin multilayer sample. The AHPA-L adsorption shifted the magnetization loop by 10–15 Oe, which is around 50% of the full magnetization value of the thin multilayer sample (not the anomalous Hall effect sample).
