Magnetization dynamics as derived from magneto impedance measurements

Local magnetization profile and geometry magnetization effects in microwires as determined by magneto-optical Kerr effect

The local magnetization profile along the length in magnetostrictive Fe-based magnetic microwires has been determined by magneto-optical Kerr effect. The study has been performed in microwires with different geometrical dimensions (i.e., diameter and length). The profiles of remanent magnetization and coercivity remain constant at the middle part for all microwires, whereas significant reductio...

Magnetic susceptibility measurements as a probe of spin transfer driven magnetization dynamics

Development of a Near-Field Magneto-Optical Microscopy for Studying Ultrafast Magnetization Dynamics

Apertureless magneto-optical near-field microscopy is developed for studying subpicosecond spindynamics at nanometer spatial scale. Polarization modulation and tip vibrations are implemented. Polarization responsivity of the tip-induced scattering is demonstrated using polarization modulation and tip vibrations. A near-field magneto-optical contrast is achieved for a thin ferromagnetic film wit...

Bi-Directional Giant Magneto Impedance Sensor

A thin film giant magneto impedance (GMI) based on magnetic field sensor has been developed using electrodeposited Ni-Fe permalloy. Chemical composition, surface morphology, and magnetic properties of Ni-Fe permalloy were characterized as a function of plateup parameters, and process conditions were established to deposit a Ni-Fe thin film with a high permeability (~1000) and a low coercivity (...

Sensor Applications of Soft Magnetic Materials Based on Magneto-Impedance, Magneto-Elastic Resonance and Magneto-Electricity

The outstanding properties of selected soft magnetic materials make them successful candidates for building high performance sensors. In this paper we present our recent work regarding different sensing technologies based on the coupling of the magnetic properties of soft magnetic materials with their electric or elastic properties. In first place we report the influence on the magneto-impedanc...