Chirally coupled nanomagnets.
- Luo Z Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland. zhaochu.luo@psi.ch laura.heyderman@psi.ch pietro.gambardella@mat.ethz.ch.
- Dao TP Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
- Hrabec A Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
- Vijayakumar J Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
- Kleibert A Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
- Baumgartner M Laboratory for Magnetism and Interface Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
- Kirk E Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
- Cui J Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
- Savchenko T Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
- Krishnaswamy G Laboratory for Magnetism and Interface Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland.
- Heyderman LJ Laboratory for Mesoscopic Systems, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland. zhaochu.luo@psi.ch laura.heyderman@psi.ch pietro.gambardella@mat.ethz.ch.
- Gambardella P Laboratory for Magnetism and Interface Physics, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland. zhaochu.luo@psi.ch laura.heyderman@psi.ch pietro.gambardella@mat.ethz.ch.
- 2019-03-30
Published in:
- Science (New York, N.Y.). - 2019
English
Magnetically coupled nanomagnets have multiple applications in nonvolatile memories, logic gates, and sensors. The most effective couplings have been found to occur between the magnetic layers in a vertical stack. We achieved strong coupling of laterally adjacent nanomagnets using the interfacial Dzyaloshinskii-Moriya interaction. This coupling is mediated by chiral domain walls between out-of-plane and in-plane magnetic regions and dominates the behavior of nanomagnets below a critical size. We used this concept to realize lateral exchange bias, field-free current-induced switching between multistate magnetic configurations as well as synthetic antiferromagnets, skyrmions, and artificial spin ices covering a broad range of length scales and topologies. Our work provides a platform to design arrays of correlated nanomagnets and to achieve all-electric control of planar logic gates and memory devices.
- Language
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- English
- Open access status
- bronze
- Identifiers
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- DOI 10.1126/science.aau7913
- PMID 30923219
- Persistent URL
- https://sonar.ch/global/documents/291806
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