Magnetoactive Metamaterials: A State‐of‐the‐Art Review

Abstract

Magnetoactive metamaterials (MMs) represent a cutting‐edge class of smart materials that integrate magnetoactive material with architected mechanical metastructures, enabling dynamic control over their mechanical, acoustic, and elastic properties through the application of external magnetic fields. This review presents an in‐depth summary of recent progress in MMs, emphasizing their design strategies, manufacturing methods, and wide‐ranging applications in areas like biomedical devices, soft robotics, and adaptive structures. The study particularly explores the integration of magnetoactive soft composite materials with mechanical metamaterials, highlighting their ability to achieve tunable physical and mechanical property changes, shape morphing, and wave manipulation. Key fabrication methods, including 3D/4D printing and conventional molding techniques, are discussed, emphasizing their role in creating complex, functional architectures. Additionally, the influence of embedded hard and soft magnetic particles on the performance of MMs made of soft elastomeric matrix is examined, emphasizing their role in achieving contactless actuation, rapid response, and multifunctionality. The review concludes with future research directions, advocating for the integration of machine learning techniques for optimized metamaterial design. The review may serve as a valuable resource for researchers and engineers aiming to harness the potential of these advanced adaptive materials for next‐generation technologies.