Magnetic properties, domain wall creep motion and the Dzyaloshinskii-Moriya interaction in Pt/Co/Ir thin films

Abstract

We study the magnetic properties of perpendicularly magnetised Pt/Co/Ir thin films and investigate the domain wall creep method of determining the interfacial Dzyaloshinskii-Moriya (DM) interaction in ultra-thin films. Measurements of the Co layer thickness dependence of saturation magnetisation, perpendicular magnetic anisotropy, and symmetric and antisymmetric (i.e. DM) exchange energies in Pt/Co/Ir thin films have been made to determine the relationship between these properties. We discuss the measurement of the DM interaction by the expansion of a reverse domain in the domain wall creep regime. We show how the creep parameters behave as a function of in-plane bias field and discuss the effects of domain wall roughness on the measurement of the DM interaction by domain expansion. Whereas modifications to the creep law with DM field and in-plane bias fields have taken into account changes in the energy barrier scaling parameter $\alpha$, we find that both $\alpha$ and the velocity scaling parameter $v_0$ change as a function of in-plane bias field.

8 pages and 4 figures

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Cited by in corpus (11)

• Domain Wall Motion and Interfacial Dzyaloshinskii-Moriya Interactions in Pt/Co/Ir$(t_{\mathrm{Ir}})$/Ta Multilayers
• Dzyaloshinskii-Moriya interaction and spin-orbit torque at the Ir/Co interface
• Disentangling factors governing Dzyaloshinskii domain wall creep in Co/Ni thin films using Pt${}_x$Ir${}_{1-x}$ seedlayers
• Magnetic properties and field-driven dynamics of chiral domain walls in epitaxial Pt/Co/Au${}_x$Pt${}_{1-x}$ trilayers
• Electric dipole moment as descriptor for interfacial Dzyaloshinskii-Moriya interaction
• Intrinsic mixed Bloch-Néel character and chirality switch of skyrmions in asymmetric epitaxial trilayer
• Dynamic symmetry breaking in chiral magnetic systems
• Quantifying symmetric exchange in ultrathin ferromagnetic films with chirality
• Effect of Ir growth pressure on the domain wall dynamics in Ta/Pt/Co/Ir/Ta stacks
• A perpendicular field electromagnet with a 250mm access bore
• Skyrmions in CeFeB Amorphous Nanodisks