Abstract
We report the Dzyaloshinskii–Moriya interaction (DMI) in Pt/Co/Re films. By measuring the current-induced hysteresis loop shift, we find that the interfacial DMI in the Pt/Co/Re structure is 2.1 pJ/m, which is stronger than that in Ir/Co/Pt asymmetric multilayers. The large DMI in this system can be attributed to an additive DMI at the Pt/Co and Co/Re interfaces; the Co/Re interface hosts a large DMI whose sign is the same as that at the Pt/Co interface. The additive DMI due to the large DMI at the Co/Re interface is consistent with theoretical predictions. The result provides a way to control the formation of chiral spin textures, such as magnetic skyrmions and chiral domain walls.
Highlights
The reason for this is that the Dzyaloshinskii–Moriya interaction (DMI) in this structure can be designed by the choice of materials for the HM and FM layers because the sign and strength of the interfacial DMI at FM/HM interfaces depend strongly on the degree of hybridization between the 3d–5d states around the Fermi level.24 In particular, an additive large DMI can be achieved in HM/FM/HM systems when the top and bottom interfaces show the same sign of the interfacial DMI.3
The DMI at ferromagnetic-metal/heavy-metal (FM/HM) interfaces appears to be important for practical applications. The reason for this is that the DMI in this structure can be designed by the choice of materials for the HM and FM layers because the sign and strength of the interfacial DMI at FM/HM interfaces depend strongly on the degree of hybridization between the 3d–5d states around the Fermi level
We investigate the DMI in Pt/Co/Re films to explore the possibility of achieving a large DMI
Summary
The reason for this is that the DMI in this structure can be designed by the choice of materials for the HM and FM layers because the sign and strength of the interfacial DMI at FM/HM interfaces depend strongly on the degree of hybridization between the 3d–5d states around the Fermi level.24 In particular, an additive large DMI can be achieved in HM/FM/HM systems when the top and bottom interfaces show the same sign of the interfacial DMI.3.
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