Title: | First-principles prediction of sub-10-nm skyrmions in Pd/Fe bilayers on Rh(111) |
Author: |
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Date: | 2018-08-27 |
Language: | English |
Scope: | 060413 |
University/Institute: | Háskóli Íslands University of Iceland |
School: | Verkfræði- og náttúruvísindasvið (HÍ) School of Engineering and Natural Sciences (UI) |
Department: | Raunvísindastofnun (HÍ) Science Institute (UI) |
Series: | Physical Review B;98(6) |
ISSN: | 2469-9950 2469-9969 (eISSN) |
DOI: | 10.1103/PhysRevB.98.060413 |
Subject: | Skyrmions; Magnetic multilayers; Density functional theory; Landau-Lifshitz model; Segulmagn; Þéttefnisfræði |
URI: | https://hdl.handle.net/20.500.11815/1007 |
Citation:Haldar, S., von Malottki, S., Meyer, S., Bessarab, P. F., & Heinze, S. (2018). First-principles prediction of sub-10-nm skyrmions in Pd/Fe bilayers on Rh(111). Physical Review B, 98(6), 060413. doi:10.1103/PhysRevB.98.060413
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Abstract:We show that stable skyrmions with diameters of a few nanometers can emerge in atomic Pd/Fe bilayers on the Rh(111) surface. Based on density functional theory we calculate the exchange and the Dzyaloshinskii-Moriya interaction as well as the magnetocrystalline anisotropy energy. The latter two terms are driven by spin-orbit coupling and significantly reduced compared to Pd/Fe bilayers on Ir(111) as expected since Rh and Ir are isoelectronic 4d and 5d transition metals. However, there is still a spin spiral ground state at zero magnetic field. Atomistic spin dynamics simulations show that a skyrmion phase occurs at small magnetic fields of ∼1 T. Skyrmion diameters amount to 2–8 nm and skyrmion lifetimes are up to 1 h at temperatures of 25–45 K.
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Description:Publisher's version (útgefin grein)
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Rights:©2018 American Physical Society
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