{
  "abstract": "Recent advances in spintronics suggest that orbital Hall currents generated by charge injection in light metals can provide nonequilibrium angular momentum without relying on strong spin-orbit coupling (SOC). Here, we examine whether such orbital currents can drive domain wall (DW) motion in an amorphous ferrimagnetic alloy, Gd$_{25}$(Fe$_{9}$Co$_{1}$)$_{75}$ (GFC), where the rare-earth sublattice offers strong SOC for orbital-to-spin conversion. We compare three representative heterostructures: Pt/GFC as a spin Hall reference, light-metal (Mn or Ti)/GFC for direct orbital-current injection, and light-metal/Pt/GFC incorporating an ultrathin Pt layer for orbital-to-spin conversion. Whereas Pt/GFC exhibits robust and reproducible spin-orbit-torque-driven DW motion, no current-driven DW motion is detected in Mn/GFC or Ti/GFC. Second-harmonic Hall measurements nevertheless reveal finite damping-like torques in both Mn/GFC and Ti/GFC, demonstrating that angular-momentum transfer into GFC does occur but is far weaker than in Pt/GFC. Inserting a 1-nm-thick Pt conversion layer strongly enhances the damping-like torque and restores DW motion. Thickness-dependent analysis further shows that DW mobility and depinning thresholds correlate with the interfacial Dzyaloshinskii-Moriya interaction and domain-wall width, highlighting weak torque conversion and insufficient interfacial stabilization of chiral DWs as key challenges for orbital-driven DW motion in light-metal/ferrimagnet heterostructures.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Journal of Applied Physics 140, 093902 (2026)",
  "arxiv": "2609.04811",
  "author_total": 5,
  "authors": [
    {
      "name": "Min-Gu Kang"
    },
    {
      "name": "Jaerin Kim"
    },
    {
      "name": "Benjamin J. Jacot"
    },
    {
      "name": "Laura Van Schie"
    },
    {
      "name": "Pietro Gambardella"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8q6k4g8sdw7qx.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.04811",
  "fulltext_url": null,
  "id": "8q6k4g8sdw7qx",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.04811",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mes-hall"
    ],
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.04811",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8q6k4g8sdw7qx.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:14Z",
      "native_id": "2609.04811",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.04811"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mes-hall",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Challenges in orbital current-driven domain wall motion in light metal/ferrimagnet heterostructures",
  "title_text": "Challenges in orbital current-driven domain wall motion in light metal/ferrimagnet heterostructures",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:14Z",
  "url": "https://research.draconitic.com/paper/8q6k4g8sdw7qx",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1063/5.0324677",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}