{
  "abstract": "Structural disorder is generally regarded as detrimental to magnetism. Since magnetic properties are governed by both the arrangement of magnetic atoms and the crystal environment, including non-magnetic atoms that mediate exchange interactions, the distinct role of magnetic and non-magnetic disorder remains less understood. The recently reported anti-Heusler alloy, Al$_2$MnCu, forming with $\\sim$50\\% intra-symmetry site disorder (B2) involving the magnetic Mn atom and $\\sim$5\\% inter-symmetry site disorder associated with non-magnetic Al and Cu atoms, offers a good platform to disentangle the individual roles of magnetic and non-magnetic atomic disorder. Our magnetic critical analysis, in the vicinity of the Curie temperature ($T_{\\rm C}$), does not lead to any conventional single universality class expected for a standard ferromagnet; instead, the non-monotonic temperature dependence of effective critical exponents points towards more complex magnetic interactions, akin to inhomogeneous ferromagnets. Dc magnetometry complemented by higher-harmonic ac magnetic susceptibility data, further confirms the persistence of locally ordered magnetic clusters above $T_{\\rm C}$. Theoretical analysis establishes that the enhancement of the local magnetic ordering temperature arises directly from the strengthening of exchange interactions due to the small degree of non-magnetic disorder, whereas $T_{\\rm C}$ is hardly influenced by the much larger level of magnetic-atom disorder. The combined experimental and theoretical investigations on the anti-Heusler alloy Al$_2$MnCu reveal and explain the unusual observation of nonmagnetic disorder-induced elevation of $T_{\\rm C}$, providing a paradigm for the counterintuitive role of disorder in magnetic materials.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.15622",
  "author_total": 8,
  "authors": [
    {
      "name": "Soumya Bhowmik"
    },
    {
      "name": "Suvayan Saha"
    },
    {
      "name": "Saikat Debnath"
    },
    {
      "name": "Arka Patra"
    },
    {
      "name": "Biswarup Satpati"
    },
    {
      "name": "Maxim Avdeev"
    },
    {
      "name": "Shishir Kumar Pandey"
    },
    {
      "name": "Chandan Mazumdar"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8mn6yp46rtfw3.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.15622",
  "fulltext_url": null,
  "id": "8mn6yp46rtfw3",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.15622",
  "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|Heusler alloys: electronic and magnetic properties"
    ]
  ],
  "openalex": "W7221810629",
  "pdf_url": "https://arxiv.org/pdf/2610.15622",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-11",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8mn6yp46rtfw3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:06Z",
      "native_id": "2610.15622",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.15622"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Enhancement of local magnetic ordering temperature due to non-magnetic disorder in anti-Heusler alloy Al$_2$MnCu",
  "title_text": "Enhancement of local magnetic ordering temperature due to non-magnetic disorder in anti-Heusler alloy Al_2MnCu",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:06Z",
  "url": "https://research.draconitic.com/paper/8mn6yp46rtfw3",
  "venue": "arXiv",
  "versions": []
}