Long-range chiral exchange interaction in synthetic antiferromagnets
Nature materials. Bd. 18. H. 7. Basingstoke: Nature Publishing Group 2019 S. 703 - 708
Erscheinungsjahr: 2019
ISBN/ISSN: 1476-4660 ; 1476-1122
Publikationstyp: Zeitschriftenaufsatz (Forschungsbericht)
Sprache: Englisch
Doi/URN: urn:nbn:de:hebis:77-publ-592254
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Inhaltszusammenfassung
The exchange interaction governs static and dynamic magnetism. This fundamental interaction comes in two flavours-symmetric and antisymmetric. the symmetric interaction leads to ferro- and antiferromagnetism, and the antisymmetric interaction has attracted significant interest owing to its major role in promoting topologically non-trivial spin textures that promise fast, energy-efficient devices. so far, the antisymmetric exchange interaction has been found to be rather short ranged and limit...The exchange interaction governs static and dynamic magnetism. This fundamental interaction comes in two flavours-symmetric and antisymmetric. the symmetric interaction leads to ferro- and antiferromagnetism, and the antisymmetric interaction has attracted significant interest owing to its major role in promoting topologically non-trivial spin textures that promise fast, energy-efficient devices. so far, the antisymmetric exchange interaction has been found to be rather short ranged and limited to a single magnetic layer. here we report a long-range antisymmetric interlayer exchange interaction in perpendicularly magnetized synthetic antiferromagnets with parallel and antiparallel magnetization alignments. asymmetric hysteresis loops under an in-plane field reveal a unidirectional and chiral nature of this interaction, which results in canted magnetic structures. we explain our results by considering spin-orbit coupling combined with reduced symmetry in multilayers. our discovery of a long-range chiral interaction provides an additional handle to engineer magnetic structures and could enable three-dimensional topological structures.» weiterlesen» einklappen
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DDC Sachgruppe:
Physik
