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Direct measurement of interfacial Dzyaloshinskii-Moriya interaction at the MoS2/Ni80Fe20 interface

IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata


Field	Value

Title	Direct measurement of interfacial Dzyaloshinskii-Moriya interaction at the MoS2/Ni80Fe20 interface

Creator	Kumar, Akash Chaurasiya, Avinash Kumar Chowdhury, Niru Mondal, Amrit Kumar Bansal, Rajni Barvat, Arun Khanna, Suraj P Pal, Prabir Chaudhary, Sujeet Barman, Anjan Muduli, P K

Subject	Engineering Materials

Description	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.

Publisher	American Institute of Physics

Date	2020-06

Type	Article PeerReviewed

Format	application/pdf

Identifier	http://cgcri.csircentral.net/4907/1/prabir.pdf 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

Relation	http://cgcri.csircentral.net/4907/