{
  "abstract": "Achieving a large strain response to a small magnetic-field variation remains a challenge in magnetomechanical materials, particularly in topological systems where the coupling between spin reconstruction and lattice deformation remains unclear. Here, we report an anomalous magnetostrictive response associated with field-induced spin reorientation in the topological Kagome magnet TbMn6Sn6. Below its spin-reorientation temperature of 310 K, an in-plane magnetic field induces an abrupt increase in magnetostriction, which exceeds 120 ppm at 240 K. This transition produces a giant differential piezomagnetic coefficient of approximately 5000 ppm T-1, far exceeding the values reported for other topological magnetic materials and commercial FeGa alloys, and placing TbMn6Sn6 among the most field-sensitive magnetostrictive materials. The field position of this peak agrees with the anomalies in magnetization and magnetotransport, demonstrating that the large differential response is tied to field-induced spin reorientation. Thermal expansion also changes across the spin-reorientation boundary. Raman measurements reveal corresponding anomalies in phonon energy and linewidth, indicating that the reorientation modifies the lattice dynamics. The combined results support a mechanism in which competing magnetic anisotropies of the Tb and Mn sublattices, coupled through Tb-Mn exchange, create magnetic configurations with different equilibrium strains. This finding establishes spin reorientation as a route to giant piezomagnetic responses in topological magnets and provides a basis for magnetomechanical sensing and switching near room temperature.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.38528",
  "author_total": 4,
  "authors": [
    {
      "name": "Hanyang Qian"
    },
    {
      "name": "Wen Sun"
    },
    {
      "name": "Juntao Huo"
    },
    {
      "name": "Guowei Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/ehdsma2tcxz5g.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.38528",
  "fulltext_url": null,
  "id": "ehdsma2tcxz5g",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.38528",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.38528",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/ehdsma2tcxz5g.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:23Z",
      "native_id": "2610.38528",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.38528"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Giant piezomagnetic response driven by spin reorientation in the topological Kagome magnet TbMn6Sn6",
  "title_text": "Giant piezomagnetic response driven by spin reorientation in the topological Kagome magnet TbMn6Sn6",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:45Z",
  "url": "https://research.draconitic.com/paper/ehdsma2tcxz5g",
  "venue": "arXiv",
  "versions": []
}