Chaurasiya, Avinash Kumar ; Kumar, Akash ; Gupta, Rahul ; Chaudhary, Sujeet ; Muduli, Pranaba Kishor ; Barman, Anjan (2019) Direct observation of unusual interfacial Dzyaloshinskii-Moriya interaction in graphene/NiFe/Ta heterostructures Physical Review B, 99 (3). ISSN 2469-9950
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Official URL: http://doi.org/10.1103/PhysRevB.99.035402
Related URL: http://dx.doi.org/10.1103/PhysRevB.99.035402
Abstract
Graphene/ferromagnet interface promises a plethora of new science and technology. The interfacial Dzyaloshinskii-Moriya interaction (iDMI) is essential for stabilizing chiral spin textures, which are important for future spintronic devices. Here, we report direct observation of iDMI in graphene/Ni80Fe20 /Ta heterostructures from nonreciprocity in spin-wave dispersion using Brillouin light-scattering technique. Linear scaling of iDMI with the inverse of Ni80Fe20 thicknesses suggests primarily interfacial origin of iDMI. Both iDMI and spin-mixing conductance increase with the increase in defect density of graphene obtained by varying argon pressure during sputter deposition of Ni80Fe20 . This suggests that the observed iDMI originates from defect-induced extrinsic spin-orbit coupling at the interface. The direct observation of iDMI at graphene/ferromagnet interface without perpendicular magnetic anisotropy opens a route in designing thin-film heterostructures based on two-dimensional materials for controlling chiral spin structure such as skyrmions and bubbles, and magnetic domain-wall-based storage and memory devices.
Item Type: | Article |
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Source: | Copyright of this article belongs to American Physical Society. |
ID Code: | 116188 |
Deposited On: | 06 Apr 2021 10:28 |
Last Modified: | 06 Apr 2021 10:28 |
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