ABSTRACT
The understanding of the dynamics and the mode spectrum of ferromagnetic micro- and nanostructures has attracted great attention for both basic and applied research. It was realized that the inhomogeneous internal magnetic field leads to additional localization phenomena or forms a barrier for tunneling of spin waves. This chapter describes experiments on microwave spectroscopy of nanorings. It presents an introduction to the basic physics of spin waves in microstructures. The chapter discusses how the lateral patterning modifies the wave-vector dispersion of spin excitations. It addresses a ring-like structure. The chapter also introduces successively the fundamental aspects which govern the spin excitations in microscopic rings. It provides information on both measurement and preparation techniques. The chapter also describes the broadband spectrometer for the magnetization dynamics measurements. It discusses patterning of thin-film magnets by means of electron beam lithography and lift-off processing.
