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Authors: Han, Dong-Soo
Lee, Kyujoon
Hanke, Jan-Philipp
Mokrousov, Yuriy
Kim, Kyoung-Whan
Yoo, Woosuk
Hees, Youri L. W. van
Kim, Tae-Wan
Lavrijsen, Reinoud
You, Chun-Yeol
Swagten, Henk J. M.
Jung, Myung-Hwa
Kläui, Mathias
Title: Long-range chiral exchange interaction in synthetic antiferromagnets
Online publication date: 4-Sep-2019
Language: english
Abstract: 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.
DDC: 530 Physik
530 Physics
Institution: Johannes Gutenberg-Universität Mainz
Department: FB 08 Physik, Mathematik u. Informatik
Place: Mainz
Version: Accepted version
Publication type: Zeitschriftenaufsatz
License: in Copyright
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Journal: Nature materials
Pages or article number: 703
Publisher: Nature Publishing Group
Publisher place: Basingstoke
Issue date: 2019
ISSN: 1476-4660
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Appears in collections:JGU-Publikationen

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