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

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.

本研究针对垂直磁化Pt/Co/Ir薄膜的磁学特性展开系统探究，并围绕用于测定超薄薄膜界面Dzyaloshinskii-Moriya（DM）相互作用的畴壁蠕变（domain wall creep）方法开展相关工作。我们测量了Pt/Co/Ir薄膜中饱和磁化强度、垂直磁各向异性以及对称与反对称（即DM）交换能随Co层厚度的依赖关系，以此明确上述磁学物性间的内在关联。我们讨论了在畴壁蠕变区中通过反向畴扩张测定DM相互作用的方法，阐明了蠕变参数随面内偏置场的变化规律，并探讨了畴壁粗糙度对通过畴扩张测定DM相互作用的影响。尽管此前针对DM场与面内偏置场修正蠕变定律的工作已考虑了势垒标度参数α的变化，但我们发现，势垒标度参数α与速度标度参数v₀均随面内偏置场发生改变。