Identifying magnetic antiskyrmions while they form with convolutional neural networks
This work addresses the bottleneck of analyzing vast data in spintronics research, enabling faster simulations for memory storage applications, but it is incremental as it applies an existing CNN method to a new domain-specific problem.
The authors tackled the problem of identifying magnetic antiskyrmions and other topological phases in chiral magnets during their formation process using a Convolutional Neural Network (CNN), achieving reliable and early identification that significantly speeds up large-scale simulations for 3D materials.
Chiral magnets have attracted a large amount of research interest in recent years because they support a variety of topological defects, such as skyrmions and bimerons, and allow for their observation and manipulation through several techniques. They also have a wide range of applications in the field of spintronics, particularly in developing new technologies for memory storage devices. However, the vast amount of data generated in these experimental and theoretical studies requires adequate tools, among which machine learning is crucial. We use a Convolutional Neural Network (CNN) to identify the relevant features in the thermodynamical phases of chiral magnets, including (anti-)skyrmions, bimerons, and helical and ferromagnetic states. We use a flexible multi-label classification framework that can correctly classify states in which different features and phases are mixed. We then train the CNN to predict the features of the final state from snapshots of intermediate states of a lattice Monte Carlo simulation. The trained model allows identifying the different phases reliably and early in the formation process. Thus, the CNN can significantly speed up the large-scale simulations for 3D materials that have been the bottleneck for quantitative studies so far. Moreover, this approach can be applied to the identification of mixed states and emerging features in real-world images of chiral magnets.