In this work, we investigated the effect of Au-intercalation on the magnetic coupling between a sub-monolayer of Co-Tetraphenylporphyrin molecules and a graphene-covered Ni(111) single crystal. Using x-ray absorption spectroscopy and x-ray magnetic circular dichroism, the element-specific magnetization and its field dependence were probed. Cobalt strongly couples antiferromagnetically to the nickel substrate, also through the graphene layer. The intercalation of graphene with gold leads to a complete removal of this coupling.
CoTPP molecules deposited on graphene/Ni (111): Quenching of the antiferromagnetic interaction induced by gold intercalation
V. Corradini, A. Candini, D. Klar, R. Biagi, V. De Renzi, A. Lodi Rizzini, N. Cavani, U. del Pennino, H. Wende, E. Otero, M. Affronte; CoTPP molecules deposited on graphene/Ni (111): Quenching of the antiferromagnetic interaction induced by gold intercalation. J. Appl. Phys. 14 April 2019; 125 (14): 142904. https://doi.org/10.1063/1.5063562
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