{
  "abstract": "Spin reorientation near room temperature offers a route to controlling antiferromagnetic order, yet LaFeO$3$, which lacks a magnetic rare-earth ion, is generally expected to retain its spin orientation along the $a$ axis below $T{\\mathrm N}\\approx740$~K. Here, we investigate LaFe$_{1-x}$Ni$_x$O$_3$ ($x=0$ and 0.1) using temperature-dependent magnetization and Raman spectroscopy over 200--400~K. Both compositions exhibit magnetic anomalies at 285.6 and 323~K, respectively, accompanied by correlated deviations of 12 Raman modes from their conventional anharmonic behavior. Principal component analysis and a global fitting approach reveal a common temperature-dependent phonon response, with mode-dependent amplitudes and signs. To interpret these anomalies, we develop a Landau-based spin-phonon coupling model describing complete, partial re-entrant, and incipient spin reorientation. Comparison with the experimental Raman profiles favors a partial, re-entrant rotation of the N'eel vector in both compositions, centered near 290~K. Ni substitution narrows the characteristic reorientation interval from approximately 116 to 84~K and enhances the magnetization anomaly by a factor of four. An additional feature near 262~K in LaFeO$_3$ is consistent with the Morin transition of trace $α$-Fe$_2$O$_3$. These findings suggest that partial spin reorientation can emerge without magnetic rare-earth ions and establish collective Raman phonon anomalies as a sensitive indirect probe of magnetic anisotropy changes in orthoferrites.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.31725",
  "author_total": 7,
  "authors": [
    {
      "name": "Subha Maity"
    },
    {
      "name": "Dushyant Singh"
    },
    {
      "name": "Vigneshwari S R"
    },
    {
      "name": "Tharundev V V"
    },
    {
      "name": "Navneet Sharma"
    },
    {
      "name": "Subhavenkadesh SS"
    },
    {
      "name": "Krista R. Khiangte"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3hs2szzsjy872.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.31725",
  "fulltext_url": null,
  "id": "3hs2szzsjy872",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.31725",
  "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.mes-hall"
    ],
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "2504|Magnetic and transport properties of perovskites and related materials"
    ]
  ],
  "openalex": "W7223660966",
  "pdf_url": "https://arxiv.org/pdf/2610.31725",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3hs2szzsjy872.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:15Z",
      "native_id": "2610.31725",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.31725"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Phonon evidence for a partial, re-entrant spin reorientation near room temperature in LaFe$_{1-x}$Ni$_x$O$_3$",
  "title_text": "Phonon evidence for a partial, re-entrant spin reorientation near room temperature in LaFe_1−xNi_xO_3",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:15Z",
  "url": "https://research.draconitic.com/paper/3hs2szzsjy872",
  "venue": "arXiv",
  "versions": []
}