Interfacial Dzyaloshinskii-Moriya interaction arising from rare-earth orbital magnetism in insulating magnetic oxides
Name
s41467-020-14924-7.pdf
Description
Published version
Size
1.46 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Caretta, Lucas Marcelo
Rosenberg, Ethan Raphael
Büttner, Felix
Fakhrul, Takian
Gargiani, Pierluigi
Valvidares, Manuel
Chen, Zhen
Reddy, Pooja
Muller, David A.
Ross, Caroline A.
Date Issued
February 2020
Journal
Nature Communications
Publisher
Springer Science and Business Media LLC
Citation
Caretta, Lucas et al. "Interfacial Dzyaloshinskii-Moriya interaction arising from rare-earth orbital magnetism in insulating magnetic oxides." Nature Communications 11, 1 (February 2020): 1090 © 2020 The Author(s)
Version
Final published version
Abstract
The Dzyaloshinskii-Moriya interaction (DMI) is responsible for exotic chiral and topological magnetic states such as spin spirals and skyrmions. DMI manifests at metallic ferromagnet/heavy-metal interfaces, owing to inversion symmetry breaking and spin-orbit coupling by a heavy metal such as Pt. Moreover, in centrosymmetric magnetic oxides interfaced by Pt, DMI-driven topological spin textures and fast current-driven dynamics have been reported, though the origin of this DMI is unclear. While in metallic systems, spin-orbit coupling arises from a proximate heavy metal, we show that in perpendicularly-magnetized iron garnets, rare-earth orbital magnetism gives rise to an intrinsic spin-orbit coupling generating interfacial DMI at mirror symmetry-breaking interfaces. We show that rare-earth ion substitution and strain engineering can significantly alter the DMI. These results provide critical insights into the origins of chiral magnetism in low-damping magnetic oxides and identify paths toward engineering chiral and topological states in centrosymmetric oxides through rare-earth ion substitution.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
Terms of Use
Creative Commons Attribution 4.0 International license
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DOI of Published Version
https://doi.org/10.1038/s41467-020-14924-7
