Asymmetric spin-wave dispersion due to Dzyaloshinskii-Moriya interaction in an ultrathin Pt/CoFeB film

Abstract

Employing Brillouin spectroscopy, strong interfacial Dzyaloshinskii-Moriya interactions have been observed in an ultrathin Pt/CoFeB film. Our micromagnetic simulations show that spin-wave nonreciprocity due to asymmetric surface pinning is insignificant for the 0.8nmthick CoFeB film studied. The observed high asymmetry of the monotonic spin wave dispersion relation is thus ascribed to strong Dzyaloshinskii-Moriya interactions present at the Pt/CoFeB interface. Our findings should further enhance the significance of CoFeB as an important material for magnonic, spintronic and skyrmionic applications.

arXiv comment12 pages, 4 figures

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• Skyrmionic magnetization configurations at chiral magnet/ferromagnet heterostructures
• Asymmetric spin wave dispersion due to a saturation magnetization gradient
• Room Temperature Magnetic Skyrmions in Gradient-Composition Engineered CoPt Single Layers
• A new class of nonreciprocal spin waves on the edges of 2D antiferromagnetic honeycomb nanoribbons
• Direct measurement of interfacial Dzyaloshinskii-Moriya interaction at the MoS${}_2$/Ni${}_{80}$Fe${}_{20}$ interface
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• Zero-field topological Hall effect in BiSb/MnGa bi-layers as a signature of ground-state skyrmions at room temperature
• Domain Wall Motion in Magnetic Nanostrips
• Brillouin Light Scattering from Quantized Spin Waves in Nanowires with Antisymmetric Exchange Interactions
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• Nonreciprocal magnon fluxonics upon ferromagnet/superconductor hybrids
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