{
  "abstract": "Grain-boundary related electrical relaxation and microstructural evolution are important factors in the frequency-dependent response of Mn–Zn ferrite. Here, La3+ substituted Mn–Zn ferrites, were synthesized by a solid-state route (calcination at 800 °C for 4 h and sintering at 1200 °C for 6 h). Rietveld refinement confirms a spinel-dominant cubic phase for all compositions. A minor orthorhombic phase appears above a La3+ threshold and remains below about 4%. The lattice parameter shows only small variation (about 8.41–8.45 Å). SEM and density analysis show grain refinement from about 1.87 µm to 1.07 µm and a non-monotonic porosity evolution (about 16–36%). Room-temperature hysteresis loops confirm soft magnetic behavior. The saturation magnetization increases strongly and reaches 33.96 emu g−1 at an intermediate La3+ level. Wideband measurements show composition-dependent relatively stable real permeability and strongly reduced magnetic loss at high frequency. Dielectric and impedance spectra show strong low-frequency dispersion consistent with Maxwell–Wagner interfacial polarization. Electric modulus and Cole–Cole plots exhibit depressed arcs, indicating non-Debye relaxation with distributed relaxation times dominated by grain boundaries. Nyquist fitting separates grain and grain-boundary responses and shows composition-tunable interfacial barrier behavior. Overall, the results demonstrate that La3+ substitution modifies the structural and microstructural state of Mn–Zn ferrites, establishing a composition-dependent balance between magnetic properties, interfacial relaxation, and high-frequency electromagnetic response.",
  "abstract_shown": true,
  "affiliations": [
    "Solid State Physics Laboratory, Dept. of Physics, Khulna University of Engineering & Technology Khulna-9203 Bangladesh"
  ],
  "article_type": "research article",
  "arxiv": null,
  "author_total": 3,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Sabbir Hasan Munna",
      "orcid": "0009-0006-6718-7748"
    },
    {
      "affs": [
        0
      ],
      "name": "Kazi Afsana Rahman",
      "orcid": "0009-0006-4113-4277"
    },
    {
      "affs": [
        0
      ],
      "name": "Md. Alamgir Hossain",
      "orcid": "0000-0002-8175-743X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/am3wp0sxpd44f.bib",
  "cited_by": 0,
  "doi": "10.1039/d6ra09155e",
  "fulltext_url": "https://pmc.ncbi.nlm.nih.gov/articles/PMC13736792/",
  "id": "am3wp0sxpd44f",
  "issns": [
    "2046-2069"
  ],
  "landing_url": "https://doi.org/10.1039/d6ra09155e",
  "language": "en",
  "licence": "CC-BY-3.0",
  "licence_label": "CC BY 3.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/3.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "heading",
      "Chemistry"
    ],
    [
      "openalex",
      "2505|Magnetic Properties and Synthesis of Ferrites"
    ]
  ],
  "openalex": "W7225332617",
  "pdf_url": "https://pubs.rsc.org/ra/article-pdf/doi/10.1039/d6ra09155e/15047622/d6ra09155e.pdf",
  "pmcid": "PMC13736792",
  "pmid": "42991324",
  "published": "2026-11-05",
  "publisher": "Royal Society of Chemistry",
  "ris": "https://research.draconitic.com/paper/am3wp0sxpd44f.ris",
  "sources": [
    {
      "first_seen": "2026-11-09T12:22:10Z",
      "native_id": "PMC13736792",
      "source": "pmc",
      "url": "https://doi.org/10.1039/d6ra09155e"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Magnetic Properties and Synthesis of Ferrites",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Improved wideband electromagnetic performance in La3+ substituted Mn–Zn spinel ferrites: structure–microstructure regulation of grain-boundary non-Debye relaxation",
  "title_text": "Improved wideband electromagnetic performance in La3+ substituted Mn–Zn spinel ferrites: structure–microstructure regulation of grain-boundary non-Debye relaxation",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T12:22:10Z",
  "url": "https://research.draconitic.com/paper/am3wp0sxpd44f",
  "venue": "RSC Advances",
  "versions": []
}