{
  "id": "1505.07718",
  "version": "v1",
  "published": "2015-05-28T15:07:53.000Z",
  "updated": "2015-05-28T15:07:53.000Z",
  "title": "Comparison of the magneto-Peltier and magneto-Seebeck effects in magnetic tunnel junctions",
  "authors": [
    "J. Shan",
    "F. K. Dejene",
    "J. C. Leutenantsmeyer",
    "J. Flipse",
    "M. Münzenberg",
    "B. J. van Wees"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "Understanding heat generation and transport processes in a magnetic tunnel junction (MTJ) is a significant step towards improving its application in current memory devices. Recent work has experimentally demonstrated the magneto-Seebeck effect in MTJs, where the Seebeck coefficient of the junction varies as the magnetic configuration changes from a parallel (P) to an anti-parallel (AP) configuration. Here we report the study on its as-yet-unexplored reciprocal effect, the magneto-Peltier effect, where the heat flow carried by the tunneling electrons is altered by changing the magnetic configuration of the MTJ. The magneto-Peltier signal that reflects the change in the temperature difference across the junction between the P and AP configurations scales linearly with the applied current in the small bias but is greatly enhanced in the large bias regime, due to higher-order Joule heating mechanisms. By carefully extracting the linear response which reflects the magneto-Peltier effect, and comparing it with the magneto-Seebeck measurements performed on the same device, we observe results consistent with Onsager reciprocity. We estimate a magneto-Peltier coefficient of 13.4 mV in the linear regime using a three-dimensional thermoelectric model. Our result opens up the possibility of programmable thermoelectric devices based on the Peltier effect in MTJs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-05-28T15:07:53.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic tunnel junction",
      "magneto-seebeck effect",
      "comparison",
      "magneto-peltier effect",
      "magnetic configuration changes"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}