{
  "id": "2002.07783",
  "version": "v1",
  "published": "2020-02-18T18:27:35.000Z",
  "updated": "2020-02-18T18:27:35.000Z",
  "title": "Dynamic percolation of ferromagnetic regions in phase separated manganites using non-uniform electric fields",
  "authors": [
    "Ambika Shakya",
    "Amlan Biswas"
  ],
  "comment": "6 pages, 5 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "Thin films of the manganite (La$_{1-y}$Pr$_y$)$_{1-x}$Ca$_x$MnO$_3$ exhibit dynamic phase coexistence with micrometer scale, fluid-like ferromagnetic metallic (FMM) regions interspersed in a charge-order insulating (COI) background. It has been previously reported that a uniform electric field realigns the fluid-like FMM regions due to a phenomenon similar to dielectrophoresis. Here we report that non-uniform electric fields have a stronger effect on the FMM regions as expected from the dielectrophoresis model. The dynamic percolation of the FMM regions is observed over a wider range of temperatures compared to the results in a uniform field. Additionally, in a non-uniform electric field, the time required for dynamic percolation along the magnetic hard axis ($t_{\\mathrm{B}}$) decreased with increasing applied voltage ($V_{\\mathrm{A}}$) as a power law, $V_{\\mathrm{A}}^{-\\delta}$ with $\\delta \\approx 5$ while $\\delta < 2$ for a uniform electric field. Our results in a non-uniform electric field provide strong evidence in favor of the dielectrophoresis model and a unique method for manipulating micrometer-sized ferromagnetic regions using electric fields.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2020-02-18T18:27:35.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "non-uniform electric field",
      "dynamic percolation",
      "phase separated manganites",
      "ferromagnetic regions",
      "fmm regions"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}