Dresden 2011 – scientific programme
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O: Fachverband Oberflächenphysik
O 77: Graphene V
O 77.3: Talk
Thursday, March 17, 2011, 15:30–15:45, WIL B321
Electronic and Magnetic Properties of the graphene/Fe/Ni(111) System: XMCD and ARPES studies — •Martin Weser1, Elena Voloshina2, Karsten Horn1, and Yuriy Dedkov1 — 1Fritz-Haber Institut der Max-Planck Gesellschaft, 14195 Berlin, Germany — 2Institut für Chemie und Biochemie, Freie Universität Berlin, 14195 Berlin, Germany
In our latest works we have demonstrated by means of XMCD and spin-resolved PES that the net magnetic moment of about 0.05-0.1 µB per carbon atom is induced in the graphene layer via its contact with ferromagnetic Ni(111) substrate. The magnetic properties of the graphene layer in this system are expected to be improved via intercalation of thin Fe layers underneath graphene on Ni(111) due to the larger magnetic moment of an Fe atom. Here we present studies of the electronic and magnetic properties of the graphene/Fe/Ni(111) intercalation-like system by means of PES, XAS, and XMCD at the Ni, Fe L2,3 and C K absorption edges. The presented results reveals an induced magnetic moment of the carbon atoms in the graphene layer aligned parallel to the Ni 3d and Fe 3d magnetization. It is found that intercalation of Fe changes drastically the magnetic response from the graphene layer. Obtained experimental results are compared with DFT calculations and magnetic moment of carbon atoms in the graphene layer is estimated before and after Fe intercalation in the graphene/Ni(111) system.