Correlation between structure, magnetic properties and MI effect during the nanocrystallisation process of FINEMET type alloys

Effect of Annealing Time on Structure of Fe_{72.5}Cu_{1}Nb_{2}Mo_{2}Si_{15.5}B_{7} Alloy

“…Amorphous ribbons of the chemical composition This behaviour has been observed by several earlier studies [5,6] and was conrmed by our XRD measurements as well (see below). Additionally, DTA measurements show that the rst exothermic peak corresponding to the rst crystalline temperature diminished with the sample annealing.…”

NMR study of the crystallization kinetics in FINEMET-type materials

“…The crystalline fraction, the grain size and the concentration of Si in the bcc Fe-Si grains are determined by the annealing temperature and the composition [15,16]. The structural evolution according to the thermal treatment and composition of the alloys is illustrated in Fig.…”

“…Still for this alloy we also note a greater hardening of the sample annealed at 650 • C in comparison to the other compositions. This is associated to the elevated B content that decreases the temperature interval between the primary crystallization of bcc Fe-Si and the precipitation of Fe-B compounds [8,16].…”

Magnetoimpedance in soft magnetic amorphous and nanostructured wires

“…The maximum of MI appears at lower values, with the increasing treatment temperature, reflecting the structural changes that take place. The highest MI response takes place for the wire annealed at 565°C, a selected temperature value that is near the primary crystallization temperature, when the wire has its soft- est magnetic behaviour [39]. As it was explained above, the electrical resistivity affects the value of the skin penetration depth, decreasing it with respect to the non-nanocrystallized state [40].…”