Magnetic properties of as-quenched Fe–Cu–Mo–Si–B nanocrystalline ribbons

✍ Scribed by Jifan Hu; Minhua Jiang; Hongwei Qin; Bo Li; H. Kronmüller

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 155 KB
• Volume: 449-451
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2006.02.355

✦ Synopsis

Nanocrystalline ribbons Fe-Cu-Mo-Si-B with excellent soft magnetic properties can be fabricated by melt-spinning technique without additional annealing processes. For as-quenched nanocrystalline ribbon Fe 71.5 Cu 3 Mo 3 Si 13.5 B 9 (numbers indicate at.%) with a grain size of D = 9 nm for ␣-Fe(Si), values of the effective permeability μ e (at 1 kHz and 0.8 A/m) = 5.43 × 10 4 , saturation magnetostriction λ s = 1 × 10 -6 , saturation magnetic induction B s = 1.25 T can be obtained. Giant magnetoimpedance was observed in as-quenched nanocrystalline ribbons of Fe-Cu-Mo-Si-B. The maximum magnetoimpedance Z/Z 0 occurs at the sample x = 3, since it has the largest permeability-variation under field, the largest permeability and smallest saturation magnetostriction among as-quenched ribbons Fe 74.5-x Cu x Mo 3 Si 13.5 B 9 . The sample with an optimal Cu content (x = 3) may have the maximum effective number density of Cu clusters that can serve as heterogeneous nucleation sites for ␣-FeSi grains.