Unveiling Stable One-dimensional Magnetic Solitons in Magnetic Bilayers

TL;DR

This paper introduces an exactly solvable model for 1D magnetic solitons in bilayer systems, enabling precise control and understanding of soliton behavior for potential logic device applications.

Contribution

It develops a novel gauge-transformed, integrable model for magnetic bilayers that predicts tunable 1D magnetic solitons and their transition behaviors.

Findings

Analytical solutions for magnetic solitons in bilayers.

Identification of a transition in soliton motion modes.

Implications for magnetic device design.

Abstract

We propose a novel model which efficiently describes the magnetization dynamics in a magnetic bilayer system. By applying a particular gauge transformation to the Landau-Lifshitz-Gilbert (LLG) equation, we successfully convert the model into an exactly integrable framework. Thus the obtained analytical solutions allows us to predict a 1D magnetic soliton pair existed by tunning the thickness of the spacing layer between the two ferrimagnetic layers. The decoupling-unlocking-locking transition of soliton motion is determined at various interaction intensitiy. Our results have implications for the manipulation of magnetic solitons and the design of magnetic soliton-based logic devices.