{
  "abstract": "This study explores influence of duration of thermal-treatment for tuning structural,magnetic,dielectric response of nano-MgFe 2 O 4 produced via sol-gel-auto-ignition. XRD(X-ray-diffraction) confirms nano-crystalline-spinelphase growth, grain sizes ranging from 25.3 to 49.3 nm following annealing at 500 • C for 1-3 h. Structural analysis reveals a non-monotonic variation in lattice parameter, and progressive grain growth. Magnetic characterization indicates enhanced A-A, A-B super-exchange-interaction, weakened B-B exchange, leading to decreased Néel magnetic moment. Cation redistribution shows, increased Mg²⁺ and reduced Fe³ ⁺ at the B-site, altering the oxygen positional parameter and inversion degree. EDS validates that Fe,Mg,O are present in the studied samples. SEM images confirm particle-aggregation, irregular size-dispersal of particles, owing to samples' magnetic-nature. Mössbauer spectroscopy reveals two magnetic-sextets corresponding to Fe³ ⁺-ions at A,Bsites, with isomer shift values confirming the +3 oxidation state. A non-magnetic doublet (~23%) is attributed to a spin-disordered shell region. Frequency-dependent-dielectric-measurements show decreasing dielectricconstant (ε′,ε″),losses, while AC-conductivity(σ ac ) increases notably, follows power-law behavior. Impedanceanalysis clearly show grain-boundaries govern dielectric-response at high frequencies. The Nyquist plot analysis reveals fitted equivalent-circuit parameters (grain resistance R g and grain-boundary resistance R gb ) that decrease progressively with annealing time, confirming improved charge transport across grain boundaries. The thermal annealing time-controlled evolution of structural,magnetic,dielectric properties indicates the suitability of Mg nanoferrites for microwave-device-applications.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "name": "S.S. Modak"
    },
    {
      "name": "P. Tiwari"
    },
    {
      "name": "V.R. Reddy"
    },
    {
      "name": "M. Coïsson"
    },
    {
      "name": "P. Tiberto"
    },
    {
      "name": "L. Hashmi"
    },
    {
      "name": "F. Celegato"
    },
    {
      "name": "G. Barrera"
    },
    {
      "name": "Shailesh I Kundalwal"
    },
    {
      "name": "Frédéric Mazaleyrat"
    },
    {
      "name": "S.N. Kane"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3hvjphdefzb33.bib",
  "cited_by": 0,
  "doi": "10.1016/j.nxmate.2026.103601",
  "fulltext_url": null,
  "id": "3hvjphdefzb33",
  "issns": [
    "2949-8228"
  ],
  "landing_url": "https://hal.science/hal-05760585v1",
  "language": "en",
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "hal",
      "0.phys"
    ],
    [
      "openalex",
      "2505|Magnetic Properties and Synthesis of Ferrites"
    ]
  ],
  "openalex": "W7213954778",
  "pdf_url": "https://hal.science/hal-05760585/document",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": "Elsevier",
  "ris": "https://research.draconitic.com/paper/3hvjphdefzb33.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:39Z",
      "native_id": "hal-05760585",
      "source": "hal",
      "url": "https://hal.science/hal-05760585v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Magnetic Properties and Synthesis of Ferrites",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Optimizing functional properties of Mg-nanoferrite by varying thermal annealing time",
  "title_text": "Optimizing functional properties of Mg-nanoferrite by varying thermal annealing time",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:17:39Z",
  "url": "https://research.draconitic.com/paper/3hvjphdefzb33",
  "venue": "Next Materials",
  "versions": []
}