ABSTRACT
This chapter discusses recent works on magnetization dynamics of reconfigurable 2D magnonic crystals. At the focal point of realizing reconfigurable 2D MCs is the fundamental understanding of how dipolar interaction influences the magnetization dynamics. The chapter shows examples of design and fabrication strategies for creating nanomagnet networks with reconfigurable magnetic ground states. For instance, using rhomboid nano-magnet (RNM) networks, a reliable reconfiguration between ferromagnetic, antiferromagnetic, and ferrimagnetic ground states can be realized. The deterministic magnetic ground-state configuration is achievable owing to inherent shape anisotropy that stabilizes the RNMs to a specific ground state upon field initialization along their short axis. The chapter outlines the effects of dipolar interaction on the magnetization dynamics in coupled nanomagnets and demonstrates its usefulness. It devotes to systematically studying the effect of dipolar interaction strength on the dynamic behavior of a single nanodisk as a function of the separation distance and cluster configuration of its neighboring nanodisks using the microfocused Brillouin light scattering (µ-BLS) technique.
