Impact of stress and magnetic field in annealing process on GMI and GSI effect of CoFeSiB amorphous material

This study focuses on investigating the impact of various annealing methods on the giant magneto-impedance (GMI) and giant stress induced GMI (GSI) effects of Co68Fe4.5Si12.5B15 ribbons. The GMI and GSI effect of the ribbons were characterized by impedance ratio under different annealing methods. The results indicate that the ribbon annealed with appropriate current density and additive 100 MPa tensile stress in Joule annealing exhibits the significant GMI ratio enhancing by 19.43 %. The study also demonstrates the significant influence of magnetic field in annealing, with magnetic field annealing showing great potential to improve both the GMI and GSI effects, increasing them to 75.76 % and 25.8 %, respectively. These findings provide insights into the development of materials with high sensitivity and thermal stability for modern sophisticated sensors.