June 16, 2020 Journal article Open Access

Legrand William; Cros Vincent

MARC21 XML Export

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    <subfield code="a">skyrmions; topological textures; spintronics</subfield>
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    <subfield code="u">Unité Mixte de Physique, CNRS/Thales, Université Paris-Saclay</subfield>
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    <subfield code="a">Room-temperature stabilization of antiferromagnetic skyrmions in synthetic antiferromagnets</subfield>
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    <subfield code="c">824123</subfield>
    <subfield code="a">Skyrmion-Topological insulator and Weyl semimetal technology</subfield>
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    <subfield code="c">665095</subfield>
    <subfield code="a">Magnetic Skyrmions for Future Nanospintronic Devices</subfield>
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    <subfield code="a">&lt;p&gt;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&lt;br&gt;
fields that prevent ultrasmall skyrmion sizes, and allows a transverse deflection of moving skyrmions that&lt;br&gt;
hinders their efficient manipulation. Antiferromagnetic skyrmions shall lift these limitations. Here we&lt;br&gt;
demonstrate that room-temperature antiferromagnetic skyrmions can be stabilized in synthetic antiferromagnets (SAFs), in which perpendicular magnetic anisotropy (PMA), antiferromagnetic coupling and chiral&lt;br&gt;
order can be adjusted concurrently. Utilizing interlayer electronic coupling to an adjacent bias layer (BL),&lt;br&gt;
we 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,&lt;br&gt;
showing that room-temperature antiferromagnetic skyrmions below 10 nm in radius can be anticipated in&lt;br&gt;
further optimized SAFs. Antiferromagnetic skyrmions in SAFs may thus solve major issues associated with&lt;br&gt;
ferromagnetic skyrmions for low-power spintronic devices.&lt;br&gt;
&amp;nbsp;&lt;/p&gt;</subfield>
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