Abstract
The Dzyaloshinskii–Moriya interaction (DMI) generates intriguing chiral magnetic objects, such as magnetic skyrmions and chiral domain walls, that can be used as building blocks in emerging magnetic nanodevices. Precise control of the DMI strength is one of the key issues for achieving better stability and functionality of these chiral objects. In this paper, we report that in magnetic trilayer films, the DMI strength exhibits a noticeable correlation with the work functions of the non-magnetic layers interfaced to the magnetic layer. This correlation with the intrinsic material parameters provides a guideline for material selection for engineering the DMI strength.
Highlights
1234567890():,; 1234567890():,; 1234567890():,; 1234567890():,; Introduction Chiral magnetic materials, the phenomena associated with them, and the technological opportunities provided by emerging spintronic devices[1,2] have recently attracted increasing academic attention. Such chiral magnetic phenomena are caused by an antisymmetric exchange interaction, which is the so-called Dzyaloshinskii–Moriya interaction (DMI).[3,4]
A sizeable DMI generates built-in chirality of magnetic domain walls (DWs), which is essential for current-induced DW motion via spin–orbit torques (SOTs).[5,6]
We report an experimental observation of the correlation between the DMI strength and the work function difference at the metal–metal interface
Summary
The phenomena associated with them, and the technological opportunities provided by emerging spintronic devices[1,2] have recently attracted increasing academic attention.
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