{
  "abstract": "The origin of ferromagnetism in the stable $β$-UH$_3$ phase is still debated. With a high Curie temperature and a short uranium-uranium interatomic distance, $β$-UH$_3$ is placed outside the known systematics of uranium compounds. Pressure provides a powerful means of tuning magnetism toward its suppression, thereby offering valuable insights into its underlying mechanisms, yet the high-pressure behavior of $β$-UH$_3$ has remained largely unexplored. Here, we combine in the Diamond Anvil Cell (DAC) the development of pure $β$-UH$_3$ synthesis and widefield nitrogen-vacancy (NV) center magnetometry to measure the pressure dependence of the Curie temperature in $β$-UH$_3$ up to about 20~GPa. We present two data analysis methods, vector magnetic field reconstruction and statistical analysis of the optically detected magnetic resonance (ODMR) response, which enable us to directly image the magnetic dipole of $β$-UH$_3$ during isobaric warming. We observe a linear decrease in the Curie temperature with pressure, yielding a slope of $\\text{d}T_C/\\text{d}P=-3.86\\,(8)$~K/GPa. Ferromagnetism in $β$-UH$_3$ is predicted to reach 0~K at approximately 44~GPa, where a quantum critical point may emerge.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.08707",
  "author_total": 5,
  "authors": [
    {
      "name": "Valentin Schmidt"
    },
    {
      "name": "Loïc Toraille"
    },
    {
      "name": "Florent Occelli"
    },
    {
      "name": "Jean-François Roch"
    },
    {
      "name": "Paul Loubeyre"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7pc8zyftkb100.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.08707",
  "fulltext_url": null,
  "id": "7pc8zyftkb100",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.08707",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "3104|Rare-earth and actinide compounds"
    ]
  ],
  "openalex": "W7211999798",
  "pdf_url": "https://arxiv.org/pdf/2609.08707",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7pc8zyftkb100.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:52Z",
      "native_id": "2609.08707",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.08707"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Pressure Dependence of Ferromagnetism in Uranium Hydride UH$_3$ up to 20 GPa Revealed by NV Centers Magnetometry",
  "title_text": "Pressure Dependence of Ferromagnetism in Uranium Hydride UH_3 up to 20 GPa Revealed by NV Centers Magnetometry",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:52Z",
  "url": "https://research.draconitic.com/paper/7pc8zyftkb100",
  "venue": "arXiv",
  "versions": []
}