Large spin conversion in the Fe/graphene/Pt interface

The realization of novel memory devices is essential due to the increasing requirements in data storage and processing. The optimization of spin-to-charge interconversion is currently one of the most sought-after topics in spintronics, since spin-orbit torque devices promise a very fast an efficient framework to develop them. In this work, we show a large enhancement, twenty times, of the spin-to-charge current conversion when inserting an atomically-thick epitaxial graphene between epitaxial iron and platinum layers. We measure this using the spin-pumping (SP) ferromagnetic resonance technique. This work opens wide possibilities for spin conversion engineering 2D materials.