{
  "abstract": "We report a comprehensive study of the temperature-dependent structural, magnetic, vibrational, and dielectric properties of Al-substituted M-type hexaferrites SrFe 12-x Al x O 19 . Neutron powder diffraction and Mössbauer spectrometry show that Al 3+ preferentially replaces Fe 3+ at spin-up octahedral sites (2 a , 12 k ), disrupting the exchange coupling with the spin-down 4 f tetrahedral sites and leading to a progressive reduction of site-specific magnetic moments and a systematic decrease in the Curie temperature, supported by temperature-dependent susceptibility measurements. Raman spectroscopy reveals pronounced phonon anomalies near T C , particularly in modes associated with bipyramidal Fe–O vibrations, reflecting the weakening of both 4 e –12 k and 4 e –4 f exchange pathways. However, the coercive field exhibits a dramatic increase, reaching µ 0 H C ∼ 1.2 T for SrFe 9.6 Al 2.4 O 19, among the largest values reported for this class. Susceptibility measurements suggest that Al substitution, while weakening the superexchange network, contributes to the stabilization of single-domain behavior.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 15,
  "authors": [
    {
      "name": "Pierfrancesco Maltoni"
    },
    {
      "name": "Ravi Dokala"
    },
    {
      "name": "Prativa Pramanik"
    },
    {
      "name": "Rafael Araujo"
    },
    {
      "name": "Tomas Edvinsson"
    },
    {
      "name": "Sergey Ivanov"
    },
    {
      "name": "Bjarne Almqvist"
    },
    {
      "name": "Gaspare Varvaro"
    },
    {
      "name": "Aldo Capobianchi"
    },
    {
      "name": "Nader Yaacoub"
    },
    {
      "name": "Charles Hervoches"
    },
    {
      "name": "Alberto Martinelli"
    },
    {
      "name": "Robert Pullar"
    },
    {
      "name": "Davide Peddis"
    },
    {
      "name": "Roland Mathieu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5vn2gg27bjfd3.bib",
  "cited_by": 1,
  "doi": "10.1016/j.actamat.2026.122273",
  "fulltext_url": null,
  "id": "5vn2gg27bjfd3",
  "issns": [
    "1359-6454"
  ],
  "landing_url": "https://hal.science/hal-05747400v1",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "openalex",
      "2505|Magnetic Properties and Synthesis of Ferrites"
    ]
  ],
  "openalex": "W7155625599",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-11",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/5vn2gg27bjfd3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:34Z",
      "native_id": "hal-05747400",
      "source": "hal",
      "url": "https://hal.science/hal-05747400v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Magnetic Properties and Synthesis of Ferrites",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Temperature dependent magnetic and structural properties of Al substituted nanostructured hexaferrites with large coercive fields",
  "title_text": "Temperature dependent magnetic and structural properties of Al substituted nanostructured hexaferrites with large coercive fields",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:34Z",
  "url": "https://research.draconitic.com/paper/5vn2gg27bjfd3",
  "venue": "Acta Materialia",
  "versions": []
}