Journal article Open Access

Room-temperature stabilization of antiferromagnetic skyrmions in synthetic antiferromagnets

Legrand William; Cros Vincent


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{
  "DOI": "10.1038/s41563-019-0468-3", 
  "author": [
    {
      "family": "Legrand William"
    }, 
    {
      "family": "Cros Vincent"
    }
  ], 
  "issued": {
    "date-parts": [
      [
        2020, 
        6, 
        16
      ]
    ]
  }, 
  "abstract": "<p>Room-temperature skyrmions in ferromagnetic films and multilayers show promise for encoding information bits in new computing technologies. Despite recent progress, ferromagnetic order generates dipolar<br>\nfields that prevent ultrasmall skyrmion sizes, and allows a transverse deflection of moving skyrmions that<br>\nhinders their efficient manipulation. Antiferromagnetic skyrmions shall lift these limitations. Here we<br>\ndemonstrate that room-temperature antiferromagnetic skyrmions can be stabilized in synthetic antiferromagnets (SAFs), in which perpendicular magnetic anisotropy (PMA), antiferromagnetic coupling and chiral<br>\norder can be adjusted concurrently. Utilizing interlayer electronic coupling to an adjacent bias layer (BL),<br>\nwe demonstrate that spin-spiral states obtained in a SAF with vanishing PMA can be turned into isolated antiferromagnetic skyrmions. We also provide model-based estimates of skyrmion size and stability,<br>\nshowing that room-temperature antiferromagnetic skyrmions below 10 nm in radius can be anticipated in<br>\nfurther optimized SAFs. Antiferromagnetic skyrmions in SAFs may thus solve major issues associated with<br>\nferromagnetic skyrmions for low-power spintronic devices.<br>\n&nbsp;</p>", 
  "title": "Room-temperature stabilization of antiferromagnetic skyrmions in synthetic antiferromagnets", 
  "type": "article-journal", 
  "id": "3896370"
}
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