| The dissertation focuses on the broadband characterization of magnetization dynamics of submicron (200-550 nm wide, 10 mum long, 100 nm thick) and micron (2-10 mum wide, 100 mum long, 100 nm thick) size patterned ferromagnetic material (Permalloy, Py) with low frequency and microwave measurement methods. Particularly the ferromagnetic resonance (FMR), damping process, magnetization reversal, mag-noise, and 1/f noise in different pattern geometry, DC current and external magnetic field bias situations are investigated. In addition to simple microwave transmission line measurements, a sensitive on-chip microwave interferometer is proposed and fabricated by means of nano-fabrication techniques. The FMR properties of an individual nanoscale Py pattern were measure with the interferometer. |
