TY  - JOUR
AU  - Han, Dong-Soo
AU  - Lee, Kyujoon
AU  - Hanke, Jan-Philipp
AU  - Mokrousov, Yuriy
AU  - Kim, Kyoung-Whan
AU  - Yoo, Woosuk
AU  - van Hees, Youri L. W.
AU  - Kim, Tae-Wan
AU  - Lavrijsen, Reinoud
AU  - You, Chun-Yeol
AU  - Swagten, Henk J. M.
AU  - Jung, Myung-Hwa
AU  - Kläui, Mathias
TI  - Long-range chiral exchange interaction in synthetic antiferromagnets
JO  - Nature materials
VL  - 18
SN  - 1476-4660
CY  - Basingstoke
PB  - Nature Publishing Group
M1  - FZJ-2019-03371
SP  - 703–708
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:31160801
UR  - <Go to ISI:>//WOS:000472020800015
DO  - DOI:10.1038/s41563-019-0370-z
UR  - https://juser.fz-juelich.de/record/863281
ER  -