{
  "abstract": "Ionic transport in oxides is generally frozen at cryogenic temperatures, where thermal energy lies far below typical cation-migration barriers. Neutron powder diffraction reveals progressive Fe/Mg redistribution between tetrahedral (A) and octahedral (B) sites in the spinel Mg0.5Fe0.5TiFeO4 upon cooling from 200 K to 5 K. A-site Fe occupancy increases toward near completion at 5 K within Rietveld resolution, while Ti remains on the B site. This exchange coincides with complex magnetic correlations rather than a classical thermally activated window. Low-temperature magnetostrictive volume changes indicate strong spin-lattice coupling, but do not identify magnetostriction as the sole thermodynamic driver. Room-temperature high-pressure X-ray diffraction produces the opposite occupancy trend, showing that volume contraction alone cannot explain the cryogenic site exchange. These results point to magneto-structural free-energy minimization as a plausible mechanism for unlocking cryogenic cation mobility in a correlated spinel oxide.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.02368",
  "author_total": 14,
  "authors": [
    {
      "name": "Yifeng Han"
    },
    {
      "name": "Yixing Zhao"
    },
    {
      "name": "Yunbo Ou"
    },
    {
      "name": "Feiran Shen"
    },
    {
      "name": "Lunhua He"
    },
    {
      "name": "Ligang Xu"
    },
    {
      "name": "Mingxue Tang"
    },
    {
      "name": "Jared Matteucci"
    },
    {
      "name": "Zexiao Zhang"
    },
    {
      "name": "Xiaoli Ma"
    },
    {
      "name": "Xiaohui Yu"
    },
    {
      "name": "Zheng Deng"
    },
    {
      "name": "Man-Rong Li"
    },
    {
      "name": "Alexandra Navrotsky"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3y4x310k9eev8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.02368",
  "fulltext_url": null,
  "id": "3y4x310k9eev8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.02368",
  "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",
      "2504|Magnetic and transport properties of perovskites and related materials"
    ]
  ],
  "openalex": "W7207728849",
  "pdf_url": "https://arxiv.org/pdf/2609.02368",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3y4x310k9eev8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.02368",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.02368"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Magneto-Structural Coupling Enables Cryogenic Cation Redistribution in a Spinel Oxide",
  "title_text": "Magneto-Structural Coupling Enables Cryogenic Cation Redistribution in a Spinel Oxide",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/3y4x310k9eev8",
  "venue": "arXiv",
  "versions": []
}