Kumar, Akash and Chaurasiya, Avinash Kumar and Chowdhury, Niru and Mondal, Amrit Kumar and Bansal, Rajni and Barvat, Arun and Khanna, Suraj P and Pal, Prabir and Chaudhary, Sujeet and Barman, Anjan and Muduli, P K (2020) Direct measurement of interfacial Dzyaloshinskii-Moriya interaction at the MoS2/Ni80Fe20 interface. Applied Physics Letters, 116 (23). Art No-232405. ISSN 0003-6951

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We report on a direct measurement of sizable interfacial Dzyaloshinskii-Moriya interaction (iDMI) at the interface of two-dimensional transition metal dichalcogenide (2D-TMD), MoS 2 and Ni 80 Fe 20 (Py), using Brillouin light scattering spectroscopy. A clear asymmetry in spin-wave dispersion is measured in MoS 2/Py/Ta, while no such asymmetry is detected in the reference Py/Ta system. A linear scaling of the DMI constant with the inverse of Py thickness indicates the interfacial origin of the observed DMI. We further observe an enhancement of DMI constant in a three to four layer MoS 2/Py system (by 56%) as compared to that in two layer MoS 2/Py, which is caused by a higher density of MoO 3 defect species in the case of three to four layer MoS 2. The results open possibilities of spin-orbitronic applications utilizing the 2D-TMD-based heterostructures.

Item Type: Article
Subjects: Engineering Materials
Depositing User: Bidhan Chaudhuri
Date Deposited: 05 Feb 2021 07:02
Last Modified: 05 Feb 2021 07:02
URI: http://cgcri.csircentral.net/id/eprint/4907

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