Element-selective modulation of interfacial Dzyaloshinskii-Moriya interaction in Pt|Co|Metal based multilayers

Abstract

Despite a decade of research, the precise mechanisms occurring at interfaces underlying the Dzyaloshinskii-Moriya interaction (DMI), and thus the possibility of fine-tuning it, are not yet fully identified. In this study, we investigate the origin of the interfacial DMI, aiming at disentangling how independent are the interfaces around the ferromagnetic layer, and what are their relative contributions to the effective DMI amplitude. For this purpose, we have grown and investigated a large variety of systems with a common structure Pt$|$Co$|M$ with $M=$ Ni, Pd, Ru, Al, Al$|$Ta and MoSi. We explore the correlation between the effective interfacial DMI, and different intrinsic properties of metals, namely atomic number, electronegativity and work function difference at the Co$|M$ interfaces. We find a linear relationship between interfacial DMI and the work function difference between the two elements, hence relating the nature of this behavior to the interfacial potential gradient at the metallic interfaces. The understanding of the DMI mechanism is of utmost importance since it opens up the possibility of precisely engineering the magnetic and hence the spintronic properties for future devices.

6 pages, 3 Figures, 1 table. Letter

References in corpus (7)

• Doping graphene with metal contacts
• Advances in the Physics of Magnetic Skyrmions and Perspective for Technology
• Hund's rule-driven Dzyaloshinskii-Moriya interaction at 3d-5d interfaces
• Spin orbit torques and Dzyaloshinskii-Moriya interaction in dual-interfaced Co-Ni multilayers
• Tuning domain wall velocity with Dzyaloshinskii-Moriya interaction
• Electric dipole moment as descriptor for interfacial Dzyaloshinskii-Moriya interaction
• Tailored flux pinning in superconductor/ferromagnet multilayers with engineered magnetic domain morphology from stripes to skyrmions

Cited by in corpus (8)

• Three-dimensional skyrmionic cocoons in magnetic multilayers
• Room Temperature Magnetic Skyrmions in Gradient-Composition Engineered CoPt Single Layers
• Room-Temperature Magnetic Skyrmions in Pt/Co/Cu Multilayers
• Densely packed skyrmions stabilized at zero magnetic field by indirect exchange coupling in multilayers
• Evidence of Strong Dzyaloshinskii-Moriya Interaction at the Cobalt/Hexagonal Boron Nitride Interface
• Control of the magnetic anisotropy in multi-repeat Pt/Co/Al heterostructures using magneto-ionic gating
• Effect of Magnetic Anisotropy and Gradient-Induced Dzyaloshinskii-Moriya Interaction on the Formation of Magnetic Skyrmions
• Dzyaloshinskii-Moriya spin density by skew scattering