On the effects of partial substitution of Co for Fe in FINEMET and Nb-containing HITPERM alloys

• Published in: Journal of physics. Condensed matter Vol. 15; no. 23; pp. 3957 - 3968
• Main Authors: Blázquez, J S, Borrego, J M, Conde, C F, Conde, A, Greneche, J M
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 18.06.2003; Institute of Physics
• Subjects: Amorphous and nanocrystalline magnetic materials; quasicrystals; Amorphous and quasicrystalline magnetic materials; Applied sciences; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Domain effects, magnetization curves, and hysteresis; Exact sciences and technology; Magnetic properties and materials; Magnetization curves, hysteresis, Barkhausen and related effects; Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects; Metals. Metallurgy; Physics; Studies of specific magnetic materials; Hyperfine magnetic field; Moessbauer effect; Curie point; Magnetization; Thermomagnetic effects; Crystallization; Iron alloys; Amorphous state; Experimental study; Thermal stability; Recrystallization; Chemical composition; Microstructure; Cobalt alloys; Nanocrystal; Transition element alloys
• ISSN: 0953-8984; 1361-648X
• DOI: 10.1088/0953-8984/15/23/309

A comparative study of the effects of partial substitution of Co for Fe on thermal stability, crystallization and magnetic properties of Co-containing FINEMET and HITPERM alloys series is presented. The difference in metalloid and Nb content between the two alloy series and the presence of Si in the nanocrystals in the case of FINEMET alloys appear as key parameters. A recrystallization process involving the *a-Fe type phase in nanocrystalline alloys of both series is evident from thermomagnetic results as a significant decrease in magnetization at the second crystallization stage.