{
  "id": "1504.00651",
  "version": "v2",
  "published": "2015-04-02T19:17:54.000Z",
  "updated": "2015-04-10T15:48:21.000Z",
  "title": "Thermodynamic Magnon Recoil for Domain Wall Motion",
  "authors": [
    "Peng Yan",
    "Yunshan Cao",
    "Jairo Sinova"
  ],
  "comment": "Submitted with revisions",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci",
    "cond-mat.stat-mech"
  ],
  "abstract": "We predict a thermodynamic magnon recoil effect for domain wall motions in the presence of temperature gradients. All current thermodynamic theories assert that a magnetic domain wall must move toward the hotter side, based on equilibrium thermodynamic arguments. Microscopic calculations on the other hand show that a domain wall can move either along or against the direction of heat currents, depending on how strong the heat currents are reflected by the domain wall. We have resolved the inconsistency between these two approaches by augmenting the theory in the presence of thermal gradients by incorporating in the free energy of domain walls by a heat current term present in nonequilibrium steady states. The condition to observe a domain wall propagation toward the colder regime is derived analytically and can be tested by future experiments.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-04-02T19:17:54.000Z",
      "abstract": "We predict a thermodynamic magnon recoil effect for domain wall motions, by considering non-equilibrium thermodynamics in the presence of temperature gradients. Presently, all thermodynamic theories assert that a magnetic domain wall must move toward the hotter side in the presence of a temperature gradient. The arguments are based on equilibrium thermodynamics, which is not strictly the case in the presence of a temperature gradient. Moreover, microscopic calculations show that a domain wall can move either along or against the direction of heat currents, depending on how strong heat currents are reflected by the domain wall. We resolve the inconsistency by augmenting the free energy of domain walls by a heat current term present in non-equilibrium thermodynamic cases. The condition to observe a domain wall propagation toward the colder regime is derived analytically and can be tested by future experiments.",
      "comment": "5 pages, 2 figures. Comments are very welcome",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2015-04-10T15:48:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "domain wall motion",
      "temperature gradient",
      "thermodynamic magnon recoil effect",
      "non-equilibrium thermodynamic",
      "magnetic domain wall"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}