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100 1 _ |a Han, Dong-Soo
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245 _ _ |a Long-range chiral exchange interaction in synthetic antiferromagnets
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520 _ _ |a 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.
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700 1 _ |a Lee, Kyujoon
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700 1 _ |a Hanke, Jan-Philipp
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700 1 _ |a Mokrousov, Yuriy
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700 1 _ |a Kim, Kyoung-Whan
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700 1 _ |a Yoo, Woosuk
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700 1 _ |a van Hees, Youri L. W.
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700 1 _ |a Kim, Tae-Wan
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700 1 _ |a Lavrijsen, Reinoud
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700 1 _ |a You, Chun-Yeol
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700 1 _ |a Jung, Myung-Hwa
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700 1 _ |a Kläui, Mathias
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773 _ _ |a 10.1038/s41563-019-0370-z
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