Probing 3D magnetic nanostructures by dark-field magneto-optical Kerr effect

Magneto-optical techniques are key tools for the characterization of magnetic effects at a nanoscale. Here, we present dark-field magneto-optical Kerr effect (DFMOKE), technique have recently developed three-dimensional nanostructures. We introduce principles DFMOKE, based on separation an incident beam into multiple reflected beams when focusing 3D nano-geometry. show modifications needed in standard focused MOKE magnetometer to perform these measurements. Finally, showcase power this method by detecting switching single tilted nanowire, independently from thin film that surrounds it. obtain independent and simultaneous detection nanowire all dimensions investigated, allowing us estimate sensitivity 7 × 10 −15 A m 2 DFMOKE setup used. conclude article providing perspectives future avenues where can be very powerful tool investigations