  Spin electronic structure of graphene pi-states and Pt 5d-states for the
Graphene/Pt interface has been investigated. Here, we report a large induced
spin-orbit splitting (~70-100 meV) of graphene pi-states with formation of
non-degenerated Dirac-cone spin states at the K-point of the BZ crossed with
spin-polarized Pt 5d-states at Fermi level that opens up a possibility for
creation of new spintronics devices. We propose to use this spin structure for
formation of spin current with spin locked perpendicular to the momentum for
induced remagnetization of the (Ni-Fe)-nanodots arranged atop the interface.
Theoretical estimations of the spin current created at the Graphene/Pt
interface and the induced intrinsic effective magnetic field leading to the
in-plane remagnetization of the NiFe-nanodots due to spin-orbit torque effect
are presented. By micromagnetic modeling based on experimentally observed
spin-orbit splitting we demonstarte that the induced intrinsic magnetic field
might be effectively used for magnetization swithching of the deposited
(Ni-Fe)-nanodots.
