Extend NdJ relationship with the size, multiple exchanges and Dzyaloshinskii-Moriya interaction for Néel skyrmions in hexagonal magnetic interfaces

Zhu, Y.; Fan, J. Y.; Wu, R. Q.

doi:10.1016/j.jmmm.2020.166805

Extend NdJ relationship with the size, multiple exchanges and Dzyaloshinskii-Moriya interaction for Néel skyrmions in hexagonal magnetic interfaces

Journal Article · Mon Mar 30 00:00:00 EDT 2020 · Journal of Magnetism and Magnetic Materials

DOI:https://doi.org/10.1016/j.jmmm.2020.166805· OSTI ID:1800324

Zhu, Y. ^[1]; Fan, J. Y. ^[2]; Wu, R. Q. ^[3]

Nanjing University of Aeronautics and Astronautics (China); OSTI
Nanjing University of Aeronautics and Astronautics (China)
Univ. of California, Irvine, CA (United States)

For the integration with other parts of spintronic devices, it is desired to minimize the size of skyrmions to a nanometer scale. To provide a theoretical guidance for this endeavour, we established an extended NdJ relationship between the skyrmion size and fundamental magnetic properties of two-dimensional hexagonal ferromagnetic lattices, including multiple exchanges between different neighbors (J₁-J₄), Dzyaloshinskii-Moriya interactions (d₁ and d₂) and on-site magnetic anisotropy energy. We demonstrated the applicability of this approach through density functional theory and spin spiral calculations for several interface, e.g., Co/Gra, Rh/Gra, Co/Pt₃ and MgO/Co/Pt₃, and showed that the size of Néel skyrmions can be effectively reduced by either enhancing d or more conveniently reducing J through cancelation of J_is.

View Accepted Manuscript (DOE)

Research Organization:: University of California, Irvine, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-05ER46237

OSTI ID:: 1800324

Journal Information:: Journal of Magnetism and Magnetic Materials, Journal Name: Journal of Magnetism and Magnetic Materials Journal Issue: C Vol. 507; ISSN 0304-8853

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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36 MATERIALS SCIENCE
DFT
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Extend NdJ relationship with the size, multiple exchanges and Dzyaloshinskii-Moriya interaction for Néel skyrmions in hexagonal magnetic interfaces

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