Han DS, Lee K, Hanke JP, Mokrousov Y, Kim KW, Yoo W, Van Hees YLW, Kim TW, Lavrijsen R, You CY, Swagten HJM, Jung MH, Klaeui M (2019)
Publication Type: Journal article
Publication year: 2019
Book Volume: 18
Pages Range: 703-708
Journal Issue: 7
DOI: 10.1038/s41563-019-0370-z
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.
APA:
Han, D.-S., Lee, K., Hanke, J.-P., Mokrousov, Y., Kim, K.-W., Yoo, W.,... Klaeui, M. (2019). Long-range chiral exchange interaction in synthetic antiferromagnets. Nature Materials, 18(7), 703-708. https://doi.org/10.1038/s41563-019-0370-z
MLA:
Han, Dong-Soo, et al. "Long-range chiral exchange interaction in synthetic antiferromagnets." Nature Materials 18.7 (2019): 703-708.
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