{
  "abstract": "Ancient magnetic fields are recorded by nanometre to micron-sized magnetic inclusions in rocks, yet resolving the individual magnetic carriers responsible for preserving these records is beyond the capacity of conventional palaeomagnetic measurements. This limitation is particularly critical for single-crystal palaeointensity studies, where such magnetic inclusions can preserve valuable records of ancient magnetic fields, both on Earth and in extraterrestrial materials, including lunar rocks, Martian meteorites, and meteorites from other parent bodies. Here we use quantum scanning magnetometry based on a single nitrogen-vacancy centre in diamond to image magnetic inclusions within natural plagioclase crystals at nanometre-scale resolution. Our approach resolves individual nanoscale magnetic sources inaccessible to conventional quantum diamond microscopy and enables quantitative mapping of their stray field signatures. Measurements of crystals from four geological formations reveal nearly two orders of magnitude variation in magnetic inclusion density and uncover previously unresolved populations of magnetic carriers with non-single-domain-like signatures within individual crystals. We also identify preferentially localized inclusions that may influence remanence anisotropy. By revealing the nanoscale carriers of magnetic remanence, our approach opens a new route to determining which minerals faithfully preserve the history of Earth's magnetic field over geological timescales.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 14,
  "authors": [
    {
      "name": "Carolin Angela Schrader"
    },
    {
      "name": "Paul Yves Jean Antonio"
    },
    {
      "name": "Léa Houzelle"
    },
    {
      "name": "Brendan Cych"
    },
    {
      "name": "Mathew Domeier"
    },
    {
      "name": "Frédéric Fernandez"
    },
    {
      "name": "Bertwin de Groot"
    },
    {
      "name": "Lennart V de Groot"
    },
    {
      "name": "Arnauld Heuret"
    },
    {
      "name": "Christophe Nevado"
    },
    {
      "name": "Fadl Raad"
    },
    {
      "name": "Justin Tonti-Filippini"
    },
    {
      "name": "Vincent Jacques"
    },
    {
      "name": "Aurore Finco"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1bkm0hpafa8kp.bib",
  "cited_by": 0,
  "doi": null,
  "fulltext_url": null,
  "id": "1bkm0hpafa8kp",
  "issns": [],
  "landing_url": "https://hal.science/hal-05852465v1",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "0.sdu"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://hal.science/hal-05852465/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1bkm0hpafa8kp.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T12:20:44Z",
      "native_id": "hal-05852465",
      "source": "hal",
      "url": "https://hal.science/hal-05852465v1"
    }
  ],
  "subjects": [
    {
      "field": "earth",
      "origin": "hal:0.sdu",
      "subfield": "general"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "Unraveling hidden magnetic carriers in geological archives with a single spin quantum sensor",
  "title_text": "Unraveling hidden magnetic carriers in geological archives with a single spin quantum sensor",
  "type": "preprint",
  "updated_at": "2026-11-06T12:20:44Z",
  "url": "https://research.draconitic.com/paper/1bkm0hpafa8kp",
  "venue": "HAL",
  "versions": []
}