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@ARTICLE{Huttmann:827875,
      author       = {Huttmann, Felix and Klar, David and Atodiresei, Nicolae and
                      Schmitz-Antoniak, Carolin and Smekhova, Alevtina and
                      Martínez-Galera, Antonio J. and Caciuc, Vasile and
                      Bihlmayer, Gustav and Blügel, Stefan and Michely, Thomas
                      and Wende, Heiko},
      title        = {{M}agnetism in a graphene- 4 f − 3 d hybrid system},
      journal      = {Physical review / B},
      volume       = {95},
      number       = {7},
      issn         = {2469-9950},
      address      = {Woodbury, NY},
      publisher    = {Inst.},
      reportid     = {FZJ-2017-01958},
      pages        = {075427},
      year         = {2017},
      abstract     = {We create an interface of graphene with a metallic and
                      magnetic support that leaves its electronic structure
                      largely intact. This is achieved by exposing epitaxial
                      graphene on ferromagnetic thin films of Co and Ni to vapor
                      of the rare earth metal Eu at elevated temperatures,
                      resulting in the intercalation of an Eu monolayer in between
                      graphene and its substrate. The system is atomically well
                      defined, with the Eu monolayer forming a (√3×√3)R30∘
                      superstructure with respect to the graphene lattice.
                      Thereby, we avoid the strong hybridization with the (Ni,Co)
                      substrate 3d states that otherwise drastically modify the
                      electronic structure of graphene. This picture is suggested
                      by our x-ray absorption spectroscopy measurements which show
                      that after Eu intercalation the empty 2p states of C atoms
                      resemble more the ones measured for graphite in contrast to
                      graphene directly bound to 3d ferromagnetic substrates. We
                      use x-ray magnetic circular dichroism at the Co and Ni L2,3
                      and Eu M4,5 as an element-specific probe to investigate
                      magnetism in these systems. An antiferromagnetic coupling
                      between Eu and Co/Ni moments is found, which is so strong
                      that a magnetic moment of the Eu layer can be detected at
                      room temperature. Density functional theory calculations
                      confirm the antiferromagnetic coupling and provide an atomic
                      insight into the magnetic coupling mechanism.},
      cin          = {IAS-1 / PGI-1 / JARA-FIT / JARA-HPC / PGI-6},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IAS-1-20090406 / I:(DE-Juel1)PGI-1-20110106 /
                      $I:(DE-82)080009_20140620$ / $I:(DE-82)080012_20140620$ /
                      I:(DE-Juel1)PGI-6-20110106},
      pnm          = {142 - Controlling Spin-Based Phenomena (POF3-142) / 143 -
                      Controlling Configuration-Based Phenomena (POF3-143)},
      pid          = {G:(DE-HGF)POF3-142 / G:(DE-HGF)POF3-143},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000394659700008},
      doi          = {10.1103/PhysRevB.95.075427},
      url          = {https://juser.fz-juelich.de/record/827875},
}