Interfacial diffusion-driven thermal magnetization switching in Tb/Co multilayers

Abstract

As an emerging frontier in magnetic materials research, terbium/cobalt (Tb/Co) multilayers exhibit unique magnetic properties. This study systematically investigates interfacial diffusion phenomena and their critical impact on the thermal magnetization switching process in Tb/Co multilayers. The microscopic mechanisms governing the process are analyzed comprehensively through numerical simulations of atomic spin dynamics. Our results demonstrate that interfacial diffusion substantially modifies the material's thermomagnetic characteristics. Specifically, it broadens the energy window required for thermal magnetization reversal, enabling switching processes to occur across wider energy ranges while enhancing operational stability and reliability. Furthermore, by combining systematic data analysis with theoretical derivations, we establish quantitative correlations between diffusion extent and key switching parameters. Importantly, we elucidate the intrinsic physical principle underlying interfacial-diffusion-accelerated thermal magnetization dynamics. These findings provide a theoretical foundation for optimizing material properties and designing high-performance thermally controlled magnetic memory devices, paving the way for significant technological advancements in this field.