Abstract
Cobalt based soft ferromagnetic amorphous alloys have unique properties which make these materials good candidates to be employed in magnetic composites prepared by dispersing granules of the alloy in a polymeric host. These alloys have excellent soft magnetic properties which are minimally affected by external stresses induced during the processing operations involved in the preparation of such a composite. Continuous ribbons of a cobalt based amorphous alloy, Metglas 2705M, were cut into large aspect ratio flakes and blended into a polyethylene host in volume fractions ranging from 0.001 to 0.15. The relative magnetic permeability values of the composites increased with increasing volume fraction of the amorphous alloy, reaching a value of 26 at the volume fraction 0.15. The magnetic properties of the composites exhibited two distinguishing features: The permeability values of these composite samples were found to vary only slightly, about 10%, as a function of frequency in the range 10 Hz-100 kHz; the samples remained unsaturated up to magnetic fields of 5800 A/m. These features are believed to be a result of the magnetic properties of the composite being heavily influenced by the polymeric gaps between the magnetic filler particles.
Original language | English |
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Pages (from-to) | 5598-5600 |
Number of pages | 3 |
Journal | Journal of Applied Physics |
Volume | 73 |
Issue number | 10 |
DOIs | |
State | Published - 1993 |