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Large Tunable Spin-to-Charge Conversion in Ni 80 Fe 20 /Molybdenum Disulfide by Cu Insertion.
ACS Applied Materials & Interfaces 2024 April 27
Spin-to-charge conversion at the interface between magnetic materials and transition metal dichalcogenides has drawn great interest in the research efforts to develop fast and ultralow power consumption devices for spintronic applications. Here, we report room temperature observations of spin-to-charge conversion arising from the interface of Ni80 Fe20 (Py) and molybdenum disulfide (MoS2 ). This phenomenon can be characterized by the inverse Edelstein effect length (λIEE ), which is enhanced with decreasing MoS2 thicknesses, demonstrating the dominant role of spin-orbital coupling (SOC) in MoS2 . The spin-to-charge conversion can be significantly improved by inserting a Cu interlayer between Py and MoS2 , suggesting that the Cu interlayer can prevent magnetic proximity effect from the Py layer and protect the SOC on the MoS2 surface from exchange interactions with Py. Furthermore, the Cu-MoS2 interface can enhance the spin current and improve electronic transport. Our results suggest that tailoring the interface of magnetic heterostructures provides an alternative strategy for the development of spintronic devices to achieve higher spin-to-charge conversion efficiencies.
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