Title :
Permeability of soft magnetic composites from flakes of nanocrystalline ribbon
Author :
Mazaleyrat, Frédéric ; Léger, Valérie ; Lebourgeois, Richard ; Barrué, Richard
Author_Institution :
SATIE, Ecole Normale Superieure de Cachan, France
fDate :
9/1/2002 12:00:00 AM
Abstract :
The permeability of powder cores is usually modeled using a nonmagnetic grain boundary model (NMGB), which is not satisfying in the case of composites based on ground nanocrystalline ribbon, especially for particles larger than several 100 μm. An improvement of the NMGB model is proposed where both in plane and perpendicular reluctances are taken into account. This model is consistent with our experimental results as well as other authors´ results in a very large range of packing fractions (30%-92%) and particle sizes (80-1000 μm).
Keywords :
amorphous magnetic materials; composite materials; ferromagnetic materials; magnetic particles; magnetic permeability; nanostructured materials; particle size; powder cores; soft magnetic materials; 80 to 1000 micron; effective permeability; magnetic permeability; magnetoelastic anisotropy; magnetomotive force; nanocrystalline ribbon flakes; nonmagnetic grain boundary model; perpendicular reluctances; plane reluctances; powder cores; soft magnetic composites; static permeability; Grain boundaries; Magnetic cores; Magnetic materials; Magnetic separation; Magnetostriction; Nanostructured materials; Permeability; Powders; Soft magnetic materials; Switched-mode power supply;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.802419
