Method to Check Sample Reproducibility by Measuring Magnetic Domain Wall Motion in Perpendicular Magnetic Anisotropy Thin Films

In this study, a method was developed to confirm the deposition reproducibility of the magnetic layer thickness through the magnetic domain wall velocity analysis in the perpendicular magnetic thin film. We analyzed the effect of magnetic layer thickness and magnetic anisotropy on the magnetic domain wall motion occurring in a perpendicular magnetic thin film composed of Pt/Co/Pt. It was confirmed that the creep scaling constant (alpha) changed rapidly in the thickness regime of the magnetic layer where perpendicular magnetic anisotropy was formed. Using this, it is possible to check the change of alpha with respect to the change in the thickness of the magnetic layer of several angstrom.