ABSTRACT
Spintronics is an emerging field of research which involves the transport of electron spin for future industrial applications. The complete understanding of high-frequency magnetization dynamics is essential to determine various intrinsic parameters of the nanostructures. In this chapter, we discuss a detailed study of the magnetization dynamics of nanostructures by ferromagnetic resonance (FMR) and Brillouin light scattering (BLS) technique. Various structures like ferromagnetic trilayer separated by nonmagnetic spacer layer, nanostrips and one-dimensional nanocylinders were analyzed both by FMR and BLS measurements. We also observed that by varying the geometry of the nanostructures, one can improve the magnetization reversal characteristics. These nanostructures are ideal for zero-field operational frequency due to their shape anisotropy. The key parameters of the nanostructures such as the saturation magnetization, internal anisotropies, demagnetizing field and exchange coupling energy were determined. These properties made magnetic nanostructures top contender for biomedical applications like GMR biosensors, drug delivery, barcoder and hyperthermia treatment. Finally, we will consider various future aspects for development of high-frequency (microwave/mm-wave) spintronic devices.
