Abstract
This chapter discusses the development of three-dimensional (3D) magnetic nanostructures and the precessional magnetization dynamics and spin-waves (SW) in different classes of 3D magnetic nanostructures. The spin structures and magnetization dynamics of these nanostructures are distinct from their bulk counterparts and thin films. The magnetic ground state highly influences the magnetization dynamics. The chapter examines various fabrication and characterization methods generally used for the growth of the magnetic nanostructures and for investigation of the magnetization dynamics in the time domain, frequency domain, and wave vector domain. The microwave response of artificial spin ice structures shows that the SW mode spectra highly depend on the applied field history. The resonance spectra of permalloy square artificial spin ice revealed the influence of local magnetization of neighboring islands during field hysteresis. The magnetization dynamics generally take place in the subnanosecond timescale. There are various tools that have emerged with the requirements of quantitative and qualitative characterization of SW dynamics of the nanostructures.
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