Antiskyrmion Dynamics: A Pathway to controlled inertial effects.

What is it about?

Our study investigates how a specific type of particle-like magnetic textures, termed Antiskyrmions, behave when interacting in pairs in magnetic multilayers called synthetic antiferromagnets. Four main modes of oscillation are identified, two gyrotropic and two azimuthal, which are dependent on the strength of the itneraction between the Antiskyrmions. Suprisingly we observe a complete suppression of the first gyrotropic mode, which is characteristic to similar geometries, when the interaction is absent, a contrast to skyrmion behavior. This effect is attributed to the competing influences of dipolar interactions and the external magnetic field on antiskyrmions. A key outcome of the study is the strong dependence of the influence of the interaction between the Antiskyrmion on their inertial mass. We show that the tuning this interaction between the antiskyrmions can offer a pathway for controlling their inertia and consequently their dynamics.

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Photo by Dan Cristian Pădureț on Unsplash

Photo by Dan Cristian Pădureț on Unsplash

Why is it important?

Our work contributes to the broader understanding of magnetic textures in condensed matter physics and highlights the potential for manipulating their dynamics in advanced technological applications. The specific outcomes of this study provide a method for controlling antiskyrmion dynamics and inertial effects in the thriving field of topological magnetic textures. Furthermore it offers a possible new experimental handle for the study of inertial mass in these systems. Our findings could have potential implications to the understanding and designing of future spintronic devices utilizing the antiferromagnetic interactions at interfaces to control the dynamic behavior of topological magnetic structures.