{
  "id": "1111.4043",
  "version": "v1",
  "published": "2011-11-17T09:30:15.000Z",
  "updated": "2011-11-17T09:30:15.000Z",
  "title": "Theory of magnetization precession induced by a picosecond strain pulse in ferromagnetic semiconductor (Ga,Mn)As",
  "authors": [
    "T. L. Linnik",
    "A. V. Scherbakov",
    "D. R. Yakovlev",
    "X. Liu",
    "J. K. Furdyna",
    "M. Bayer"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "A theoretical model of the coherent precession of magnetization excited by a picosecond acoustic pulse in a ferromagnetic semiconductor layer of (Ga,Mn)As is developed. The short strain pulse injected into the ferromagnetic layer modifies the magnetocrystalline anisotropy resulting in a tilt of the equilibrium orientation of magnetization and subsequent magnetization precession. We derive a quantitative model of this effect using the Landau-Lifshitz equation for the magnetization that is precessing in the time-dependent effective magnetic field. After developing the general formalism, we then provide a numerical analysis for a certain structure and two typical experimental geometries in which an external magnetic field is applied either along the hard or the easy magnetization axis. As a result we identify three main factors, which determine the precession amplitude: the magnetocrystalline anisotropy of the ferromagnetic layer, its thickness, and the strain pulse parameters.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-11-17T09:30:15.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "75.78.Jp",
      "43.35.+d",
      "75.30.Gw",
      "75.50.Pp"
    ],
    "keywords": [
      "picosecond strain pulse",
      "magnetization precession",
      "magnetic field",
      "magnetocrystalline anisotropy",
      "picosecond acoustic pulse"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevB.84.214432",
      "journal": "Physical Review B",
      "year": 2011,
      "month": "Dec",
      "volume": 84,
      "number": 21,
      "pages": 214432
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011PhRvB..84u4432L"
    }
  }
}