{
  "id": "2101.09946",
  "version": "v1",
  "published": "2021-01-25T08:19:20.000Z",
  "updated": "2021-01-25T08:19:20.000Z",
  "title": "Determining the Proximity Effect Induced Magnetic Moment in Graphene by Polarised Neutron Reflectivity and X-ray Magnetic Circular Dichroism",
  "authors": [
    "R. O. M. Aboljadayel",
    "D. M. Love",
    "C. A. F. Vaz",
    "R. S. Weatherup",
    "P. Braeuninger-Weimer",
    "M. -B. Martin",
    "A. Cabrero-Vilatela",
    "A. Ionescu",
    "C. J. Kinane",
    "T. R. Charlton",
    "J. Llandro",
    "P. M. S. Monteiro",
    "C. H. W. Barnes",
    "S. Hofmann",
    "S. Langridge"
  ],
  "comment": "30 pages, 13 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We report the magnitude of the induced magnetic moment in CVD-grown epitaxial and rotated-domain graphene as a result of the proximity effect in the vicinity of the ferromagnetic substrates Co and Ni, using polarised neutron reflectivity (PNR). Although rotated-domain graphene is known to interact weakly with the ferromagnetic underlayer in comparison with the epitaxial graphene, the PNR results indicate an induced magnetic moment of $\\sim$ 0.57 $\\mu_\\textrm{B}$/C atom at 10 K for both structures. The origin of the induced magnetic moment is found to be due to the opening of the graphene's Dirac cone as a result of the strong C $p_z-3d$ hybridisation, which was confirmed by additional PNR measurements using a non-magnetic Ni$_9$Mo$_1$ and Cu substrates. We validated our PNR fitting models using the Bayesian uncertainty analysis and corroborated the results by X-ray magnetic circular dichroism measurements.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-01-25T08:19:20.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "x-ray magnetic circular dichroism",
      "proximity effect induced magnetic moment",
      "polarised neutron reflectivity",
      "magnetic circular dichroism measurements"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 30,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}