{
  "annotation_id": "e0ee392d-0a2e-4eb4-8394-8dacde480681",
  "date_created": "2026-03-02T18:01:14.641000Z",
  "date_modified": "2026-03-02T18:01:14.641000Z",
  "file_hash": "f63b8f2037cbec72019f9378850c057e9460d3d88eda3a14c42b3aa215d5bf82",
  "private": false,
  "record": {
    "abstract": "We demonstrate the detection of magnetic particles carried by water in a\ncontinuous flow using an atomic magnetic gradiometer. Studies on three types of\nmagnetic particles are presented: a single cobalt particle (diameter ~150 um,\nmulti-domain), a suspension of superparamagnetic magnetite particles (diameter\n\\~1 um), and ferromagnetic cobalt nanoparticles (diameter ~10 nm, 120 kA/m\nmagnetization). Estimated detection limits are 20 um diameter for a single\ncobalt particle at a water flow rate 30 ml/min, 5x10^3 magnetite particles at\n160 ml/min, and 50 pl for the specific ferromagnetic fluid at 130 ml/min.\nPossible applications of our method are discussed.",
    "arxiv_id": "physics/0609197",
    "authors": [
      "S. Xu",
      "M. H. Donaldson",
      "A. Pines",
      "S. M. Rochester",
      "D. Budker",
      "V. V. Yashchuk"
    ],
    "categories": [
      "physics.ins-det",
      "physics.atom-ph"
    ],
    "doi": "10.1063/1.2400077",
    "title": "Application of atomic magnetometry in magnetic particle detection",
    "url": "https://arxiv.org/abs/physics/0609197"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fe8a9ed6-6e88-40be-af83-537887922e04",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}