{
  "id": "2304.08228",
  "version": "v1",
  "published": "2023-04-17T12:53:51.000Z",
  "updated": "2023-04-17T12:53:51.000Z",
  "title": "The impact of local pinning sites in magnetic tunnel junctions with non-homogeneous free layers",
  "authors": [
    "Alex. S. Jenkins",
    "Leandro Martins",
    "Luana Benetti",
    "Alejandro Schulman",
    "Pedro Anacleto",
    "Marcel Claro",
    "Elvira Paz",
    "Ihsan Çaha",
    "Francis Leonard Deepak",
    "Ricardo Ferreira"
  ],
  "comment": "5 figures publication",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Pinning at local defects is a significant road block for the successful implementation of technological paradigms which rely on the dynamic properties of non-trivial magnetic textures. In this report a comprehensive study of the influence of local pinning sites for non-homogeneous magnetic layers integrated as the free layer of a magnetic tunnel junction is presented, both experimentally and with corresponding micromagnetic simulations. The pinning sites are found to be extremely detrimental to the frequency controllability of the devices, a key requirement for their use as synapses in a frequency multiplexed artificial neural networks. In addition to describing the impact of the local pinning sites in the more conventional NiFe, a vortex-based magnetic tunnel junction with an amorphous free layer is presented which shows significantly improved frequency selectivity, marking a clear direction for the design of future low power devices.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-04-17T12:53:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "magnetic tunnel junction",
      "local pinning sites",
      "non-homogeneous free layers",
      "frequency multiplexed artificial neural networks",
      "non-trivial magnetic textures"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}