{
  "annotation_id": "dd9fe713-c59d-4c90-90b4-7d5264d251fb",
  "date_created": "2026-03-02T18:00:53.458000Z",
  "date_modified": "2026-03-02T18:00:53.458000Z",
  "file_hash": "124c7e2545d444d64ed17b17ed5063f06693da774699149e93e483d86c5f2f32",
  "private": false,
  "record": {
    "abstract": "A model of magnetic interactions in the ordered ferromagnetic FePt is\nproposed on the basis of first-principles calculations of non-collinear\nmagnetic configurations and shown to be capable of explaining recent\nmeasurements of magnetic anisotropy energy (MAE). The site (Fe,Pt) resolved\ncontributions to the MAE have been distinguished with small Fe easy-plane and\nlarge Pt easy-axis terms. This model has been tested against available\nexperimental data on the temperature dependence of MAE showing scaling of\nuniaxial MAE (K$_{1}$(T)) with magnetization (M(T)) $K_{1}(T) \\sim\nM(T)^{\\gamma}$ characterized by the unusual exponent of $\\gamma= 2.1$. It is\nshown that this unusual behavior of the FePt can be quantitatively explained\nwithin the proposed model and originates from an effective anisotropic exchange\nmediated by the induced Pt moment. The latter is expected to be a common\nfeature of 3d-5d(4d) alloys having 5d/4d elements with large spin-orbit\ncoupling and exchange enhanced Stoner susceptibility.",
    "arxiv_id": "physics/0411020",
    "authors": [
      "O. N. Mryasov",
      "U. Nowak",
      "K. Y. Guslienko",
      "R. W. Chantrell"
    ],
    "categories": [
      "physics.flu-dyn",
      "cond-mat.mtrl-sci",
      "physics.comp-ph"
    ],
    "doi": "10.1209/epl/i2004-10404-2",
    "title": "Temperature dependent magnetic properties of FePt: effective spin   Hamiltonian model",
    "url": "https://arxiv.org/abs/physics/0411020"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5ca4a514-6df6-4f02-ad13-d49aea8d2bf7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}