Journal article Open Access
Legrand William; Cros Vincent
{ "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 </p>", "title": "Room-temperature stabilization of antiferromagnetic skyrmions in synthetic antiferromagnets", "type": "article-journal", "id": "3896370" }
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