{
  "abstract": "Nanoscale miniaturization has revolutionized the field of spintronics by enabling exponential growth in areal bit density. A similar leap is also expected in device speeds through successfully harnessing femtosecond magnetization dynamics. However, combining this with the miniaturization of realistic devices is challenging. To address this, we studied the effect of dimensional confinement on the femtosecond demagnetization of Fe. By gradually increasing the level of confinement while keeping excitation conditions constant, we found that Fe layers thinner than 10 nm exhibit enlarged demagnetization amplitudes, reaching a ∼75% increase at 2 nm. By combining ultrafast experiments sensitive to the spins, the charge carriers, and the phonons, we establish that this finite‐size effect is magnetic in origin and is not phonon‐driven. With the support of ab initio calculations and atomistic spin dynamics simulations, we identify the enhancement effect as due to local weakening of spin order at the Fe's interface, which becomes significant upon increased confinement.",
  "abstract_shown": true,
  "affiliations": [
    "Institut für Physik und Astronomie Technische Universität Berlin Berlin Germany",
    "Fritz Haber Institute of the Max Planck Society Berlin Germany",
    "Faculty of Physics and Center for Nanointegration Duisburg‐Essen (CENIDE) University of Duisburg‐Essen Duisburg Germany",
    "Department of Physics University of Konstanz Konstanz Germany",
    "Technical University of Applied Sciences Wildau Wildau Germany",
    "Helmholtz‐Zentrum Berlin für Materialien und Energie GmbH Berlin Germany",
    "SLAC National Accelerator Laboratory Menlo Park California USA",
    "Department of Physics TU Dortmund University Dortmund Germany",
    "Institute for Solid State Physics The University of Tokyo Kashiwa Chiba Japan"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 24,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Yoav William Windsor",
      "orcid": "0000-0001-6371-5837"
    },
    {
      "affs": [
        2
      ],
      "name": "Tobias Lojewski"
    },
    {
      "affs": [
        3
      ],
      "name": "Moumita Kundu",
      "orcid": "0009-0002-9993-7794"
    },
    {
      "affs": [
        2
      ],
      "name": "Klaus Sokolowski‐Tinten",
      "orcid": "0000-0002-7979-5357"
    },
    {
      "affs": [
        2
      ],
      "name": "Nico Rothenbach"
    },
    {
      "affs": [
        2
      ],
      "name": "Andrea Eschenlohr",
      "orcid": "0000-0002-0814-3511"
    },
    {
      "affs": [
        2
      ],
      "name": "Markus Ernst Gruner",
      "orcid": "0000-0002-2306-1258"
    },
    {
      "affs": [
        2
      ],
      "name": "Katharina Ollefs"
    },
    {
      "affs": [
        4
      ],
      "name": "Carolin Schmitz‐Antoniak"
    },
    {
      "affs": [
        2
      ],
      "name": "Soma Salamon",
      "orcid": "0000-0002-8661-6038"
    },
    {
      "affs": [
        1
      ],
      "name": "Daniela Zahn",
      "orcid": "0000-0002-7606-0961"
    },
    {
      "affs": [
        1
      ],
      "name": "Laurenz Rettig",
      "orcid": "0000-0002-0725-6696"
    },
    {
      "affs": [
        5
      ],
      "name": "Christian Schüßler‐Langeheine",
      "orcid": "0000-0002-4553-9726"
    },
    {
      "affs": [
        5
      ],
      "name": "Niko Pontius"
    },
    {
      "affs": [
        6
      ],
      "name": "Renkai Li"
    },
    {
      "affs": [
        6
      ],
      "name": "Mianzhen Mo",
      "orcid": "0000-0002-2962-0815"
    },
    {
      "affs": [
        6
      ],
      "name": "Suji Park",
      "orcid": "0000-0002-2269-7705"
    },
    {
      "affs": [
        6
      ],
      "name": "Xiaoshe Shen"
    },
    {
      "affs": [
        6
      ],
      "name": "Stephen Weathersby"
    },
    {
      "affs": [
        2,
        6,
        7
      ],
      "name": "Xijie Wang"
    },
    {
      "affs": [
        2
      ],
      "name": "Rossitza Pentcheva",
      "orcid": "0000-0002-4423-8980"
    },
    {
      "affs": [
        2
      ],
      "name": "Heiko Wende",
      "orcid": "0000-0001-8395-3541"
    },
    {
      "affs": [
        3
      ],
      "name": "Ulrich Nowak"
    },
    {
      "affs": [
        2,
        8
      ],
      "name": "Uwe Bovensiepen",
      "orcid": "0000-0002-1506-4491"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fc6qvj24s73kx.bib",
  "cited_by": 1,
  "doi": "10.1002/advs.77058",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13464455/",
  "id": "fc6qvj24s73kx",
  "issns": [
    "2198-3844"
  ],
  "landing_url": "https://doi.org/10.1002/advs.77058",
  "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": [
    [
      "heading",
      "Research Article"
    ],
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      "openalex",
      "3107|Magnetic properties of thin films"
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  "openalex": "W7162662088",
  "pdf_url": null,
  "pmcid": "PMC13464455",
  "pmid": "42584398",
  "published": "2026-08-12",
  "publisher": "Wiley",
  "ris": "https://research.draconitic.com/paper/fc6qvj24s73kx.ris",
  "sources": [
    {
      "first_seen": "2026-11-06T12:23:12Z",
      "native_id": "PMC13464455",
      "source": "pmc",
      "url": "https://doi.org/10.1002/advs.77058"
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  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3107|Magnetic properties of thin films",
      "subfield": "amo"
    }
  ],
  "title": "Nanoscale Confinement Enhances Ultrafast Demagnetization",
  "title_text": "Nanoscale Confinement Enhances Ultrafast Demagnetization",
  "type": "peer-reviewed",
  "updated_at": "2026-11-07T12:20:30Z",
  "url": "https://research.draconitic.com/paper/fc6qvj24s73kx",
  "venue": "Advanced Science",
  "versions": []
}