{
  "id": "1308.6703",
  "version": "v1",
  "published": "2013-08-30T10:29:56.000Z",
  "updated": "2013-08-30T10:29:56.000Z",
  "title": "First-principles study of spin-transfer torque in Co2MnSi/Al/Co2MnSi spin-valve",
  "authors": [
    "Ling Tang",
    "Zejin Yang"
  ],
  "comment": "7 pages, 6 figures",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "The spin-transfer torque (STT) in Co2MnSi(CMS)/Al/Co2MnSi spin-valve system with and without interfacial disorder is studied by a first-principles noncollinear wave-function-matching method. It is shown that in the case of clean interface the angular dependence of STT for CoCo/Al (the asymmetry parameter Lambda approx. 4.5) is more skewed than that for MnSi/Al (Lambda approx. 2.9), which suggests the clean CoCo/Al architecture is much more efficient for the application on radio frequency oscillation. We also find that even with interfacial disorder the spin-valve of half-metallic CMS still has a relatively large parameter Lambda compared to that of conventional ferromagnet. In addition, for clean interface the in-plane torkance of MnSi/Al is about twice as large as that of CoCo/Al. However, as long as the degree of interfacial disorder is sufficiently large, the CoCo/Al and MnSi/Al will show approximately the same magnitude of in-plane torkance. Furthermore, our results demonstrate that CMS/Al/CMS system has very high efficiency of STT to switch the magnetic layer of spin-valve.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-08-30T10:29:56.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "72.25.Mk",
      "85.75.-d",
      "75.70.Cn"
    ],
    "keywords": [
      "spin-transfer torque",
      "co2mnsi/al/co2mnsi spin-valve",
      "first-principles study",
      "interfacial disorder",
      "large parameter lambda"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1063/1.4831959",
      "journal": "Journal of Applied Physics",
      "year": 2013,
      "month": "Nov",
      "volume": 114,
      "number": 19,
      "pages": 3703
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013JAP...114s3703T"
    }
  }
}