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arXiv · 2607.25470

Anisotropic domain wall velocity profiles in the creep regime: the interplay of chiral damping, stiffness and Dzyaloshinskii-Moriya interaction

Adriano Di Pietro·Alessandro Magni·Stefania Pizzini·Frowin Dörr·Yasser Shokr·Gianfranco Durin·Silvia Tacchi·Marco Madami·Giovanni Carlotti·Emily Darwin·Alexandra J. Huxtable·Christopher H. Marrows·Bryan J. Hickey·Michaela Kuepferling
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Abstract

The asymmetric expansion of magnetic bubble domains in ultrathin ferromagnets provides a powerful route to probe the interfacial Dzyaloshinskii-Moriya interaction (DMI). While conventional analyses rely on domain wall velocities measured along selected directions as a function of in-plane field, recent approaches have highlighted the additional insight contained in the angular dependence of the velocity, $v(θ)$. Here, we develop an extended angular creep model that incorporates both the dispersive domain wall stiffness and a chirality-dependent prefactor associated with chiral damping. This generalization captures the full anisotropic dynamics of domain wall motion around a bubble domain. We show that these contributions significantly modify the angular velocity profile and can lead to features not accessible within existing models. Our results establish a more complete framework for interpreting creep-driven domain expansion and provide improved sensitivity for the quantitative extraction of DMI and chiral dynamical effects.

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Adriano Di Pietro, Alessandro Magni, Stefania Pizzini, Frowin Dörr, Yasser Shokr, Gianfranco Durin, Silvia Tacchi, Marco Madami, Giovanni Carlotti, Emily Darwin, Alexandra J. Huxtable, Christopher H. Marrows, Bryan J. Hickey, Michaela Kuepferling. 2026-07-28. Anisotropic domain wall velocity profiles in the creep regime: the interplay of chiral damping, stiffness and Dzyaloshinskii-Moriya interaction. https://arxiv.org/abs/2607.25470

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