{
  "abstract": "Understanding and controlling acoustic and spin-wave excitations in magnetic thin films is critical for the development of magnonic and spin-acoustic devices. We report on the use of Cr and W buffer layers to independently modify the acoustic and magnetic excitations in Co2FeGe full-Heusler thin films grown on MgO(001). Using Brillouin light scattering (BLS) spectroscopy and ferromagnetic resonance (FMR), we probed Rayleigh and Sezawa surface acoustic waves (SAWs) alongside Damon-Eshbach and perpendicular standing spin-wave (PSSW) modes. Our results show that acoustic dispersion depends strongly on the buffer material; W-buffered films exhibit a pronounced 16% reduction in Rayleigh SAW frequency compared to buffer-free films, primarily due to mass loading and acoustic impedance shifts. While the buffer layers significantly shift acoustic frequencies, they simultaneously modify the dynamic magnetic response (increasing spin-wave group velocity by ~34%) through different physical mechanisms. Finite-element simulations show excellent agreement with the experimental acoustic data. These findings demonstrate that buffer-layer engineering is an effective strategy for the independent tailoring of elastic and magnetic excitations, providing a versatile platform for hybrid spin-acoustic technologies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.00864",
  "author_total": 10,
  "authors": [
    {
      "name": "A. V. Achuthan"
    },
    {
      "name": "A. Vovk"
    },
    {
      "name": "S. Bunyaev"
    },
    {
      "name": "B. Postolnyi"
    },
    {
      "name": "P. Štrichovanec"
    },
    {
      "name": "P. A. Algarabel"
    },
    {
      "name": "K. Załęski"
    },
    {
      "name": "J. P. Araujo"
    },
    {
      "name": "G. N. Kakazei"
    },
    {
      "name": "A. Trzaskowska"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4zmgh0kz8txfh.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.00864",
  "fulltext_url": null,
  "id": "4zmgh0kz8txfh",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.00864",
  "language": null,
  "licence": "CC-BY-SA-4.0",
  "licence_label": "CC BY-SA 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-sa/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "3107|Magnetic properties of thin films"
    ]
  ],
  "openalex": "W7206208619",
  "pdf_url": "https://arxiv.org/pdf/2609.00864",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-01",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4zmgh0kz8txfh.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:00Z",
      "native_id": "2609.00864",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.00864"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Independent Tuning of Surface Acoustic-Waves and Spin-Waves via Buffer-Layer Engineering in Co2FeGe Heusler Thin Films",
  "title_text": "Independent Tuning of Surface Acoustic-Waves and Spin-Waves via Buffer-Layer Engineering in Co2FeGe Heusler Thin Films",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:00Z",
  "url": "https://research.draconitic.com/paper/4zmgh0kz8txfh",
  "venue": "arXiv",
  "versions": []
}