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Thickness Dependence of Creep-Scaling behavior in Pt/Co Single Interface Films
Journal of Magnetics, Volume 28, Number 3, 30 Sep 2023, Pages 227-229
Abstract
We report here the ferromagnetic-layer thickness dependence of the creep-scaling behavior in Pt/Co single
interface films. By means of an in-vacuum magneto-optical Kerr effect microscope, the magnetization dynamics
were observed in the films with different Co layer thickness. From the clear domain-wall creep-scaling
behaviors, the creep-scaling constant was determined and analyzed with respect to the Co layer thickness. The
thickness dependence of the creep-scaling constant manifests the formation of a ferromagnetic dead layer, the
thickness of which is roughly about one monoatomic layer. By excluding the dead-layer thickness, it becomes
clear that the effective magnetic layer thickness is proportional to the creep-scaling constant, confirming the
validity of the creep-scaling theory.
interface films. By means of an in-vacuum magneto-optical Kerr effect microscope, the magnetization dynamics
were observed in the films with different Co layer thickness. From the clear domain-wall creep-scaling
behaviors, the creep-scaling constant was determined and analyzed with respect to the Co layer thickness. The
thickness dependence of the creep-scaling constant manifests the formation of a ferromagnetic dead layer, the
thickness of which is roughly about one monoatomic layer. By excluding the dead-layer thickness, it becomes
clear that the effective magnetic layer thickness is proportional to the creep-scaling constant, confirming the
validity of the creep-scaling theory.
Keywords: domain walls; creep; perpendicular magnetic anisotropy
DOI: https://doi.org/10.4283/JMAG.2023.28.3.227
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