MaDRAS · The role of magnetism in the search of radiation-resistant materials for fusion reactors

Nuclear fusion reactors require materials capable of enduring extreme radiation levels, posing a significant challenge in materials science. Radiaton-induced defects such as vacancies, interstitials, and dislocations critically influence the mechanical and thermal properties of these materials, and their behavior is strongly affected by the material’s magnetic state. Understanding the interplay between magnetism and defect properties is essential for advancing nuclear material development and designing materials with superior mechanical and radiation performance. Spin-Lattice Dynamics (SLD) simulations, which couple atomic and magnetic degrees of freedom, provide an optimal framework and a powerful tool to explore these interactions at the atomistic level. The MaDRAS project aims to investigate the interconnections between defects and magnetic properties in nuclear materials through SLD simulations. By focusing on the role of magnetism in defect behavior in two candidate materials for fusion reactor, FeCr alloys and FeCrNiMn high entropy alloys, the project seeks to identify mechanisms that contribute to the development of materials with better performance for nuclear applications. The primary goals are to establish a computational framework for assessing both the role of magnetic excitations in radiation-induced defects in nuclear materials and the influence of such defects on magnetic properties. The successful completion of this project will not only contribute to the fundamental understanding of magnetism’s role in defect production and mobility but could also drive significant innovations in the design of materials for fusion reactors and other advanced nuclear technologies.