Article ID Journal Published Year Pages File Type
1583981 Materials Science and Engineering: A 2007 4 Pages PDF
Abstract
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 Fe71.5Cu3Mo3Si13.5B9 (numbers indicate at.%) with a grain size of D  = 9 nm for α-Fe(Si), values of the effective permeability μe (at 1 kHz and 0.8 A/m) = 5.43 × 104, saturation magnetostriction λs = 1 × 10−6, saturation magnetic induction Bs = 1.25 T can be obtained. Giant magnetoimpedance was observed in as-quenched nanocrystalline ribbons of Fe-Cu-Mo-Si-B. The maximum magnetoimpedance ΔZ/Z0 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 Fe74.5−xCuxMo3Si13.5B9. 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 α-FeSi grains.
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Physical Sciences and Engineering Materials Science Materials Science (General)
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