Accurate calculation of the transverse anisotropy in perpendicularly magnetized multilayers

Abstract

The transverse anisotropy constant and the related Döring mass density are key parameters of the one-dimensional model to describe the motion of magnetic domain walls. So far, no general framework is available to determine these quantities from static characterizations such as magnetometry measurements. Here, we derive a universal analytical expression to calculate the transverse anisotropy constant for the important class of perpendicular magnetic multilayers. All the required input parameters of the model, such as the number of repeats, the thickness of a single magnetic layer, and the layer periodicity, as well as the effective perpendicular anisotropy, the saturation magnetization, and the static domain wall width are accessible by static sample characterizations. We apply our model to a widely used multilayer system and find that the effective transverse anisotropy constant is a factor 7 different from the when using the conventional approximations, showing the importance of using our analysis scheme.

References in corpus (5)

• Current-driven dynamics of chiral ferromagnetic domain walls
• Creep and flow regimes of magnetic domain wall motion in ultrathin Pt/Co/Pt films with perpendicular anisotropy
• Microscopic approach to current-driven domain wall dynamics
• The nature of domain walls in ultrathin ferromagnets revealed by scanning nanomagnetometry
• Current-induced domain wall motion in a nanowire with perpendicular magnetic anisotropy

Cited by in corpus (4)

• Twisted domain walls and skyrmions in perpendicularly magnetized multilayers
• Walker breakdown with a twist: Dynamics of multilayer domain walls and skyrmions driven by spin-orbit torque
• Measuring the Dzyaloshinskii-Moriya interaction of the epitaxial Co/Ir(111) interface
• High-mobility inertial domain walls driven by spin-transfer torque in a ferrimagnetic spinel oxide