Fe-based bulk amorphous soft magnetic materials

• Published in: Journal of magnetism and magnetic materials 2006-09, Vol.304 (2), p.192-196
• Main Authors: Roth, S., Stoica, M., Degmová, J., Gaitzsch, U., Eckert, J., Schultz, L.
• Format: Article
• Language: English
• Subjects: Amorphous and quasicrystalline magnetic materials; Bulk amorphous alloy; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Fe-based alloy; Magnetic properties and materials; Magnetostrictive composite; Physics; Studies of specific magnetic materials
• ISSN: 0304-8853
• DOI: 10.1016/j.jmmm.2006.02.121

Fe-based bulk amorphous materials have no crystal anisotropy. This is why they are good candidates for the application as soft magnetic materials, although conventional soft magnetic alloys have a higher saturation magnetization than the amorphous alloys. An Fe 65.5Cr 4Mo 4Ga 4P 12C 5B 5.5 alloy shows, together with excellent soft magnetic behaviour, a very high mechanical strength and a high resistance against corrosion which may be important for application as magnetic parts in valves, clutches, or relays. Fe 77Al 2.14Ga 0.86P 8.4C 5B 4Si 2 bulk amorphous materials were prepared by the powder-metallurgical technology. This technological route allows to prepare samples of larger dimensions. Furthermore, active powders, e.g. high magnetostrictive Fe 2Sm-powder, may be added to the powder. Thus, composites with high magnetostrictive response and high mechanical strength may be prepared profiting from the low processing temperature.