Granular magnetic composites employing cobalt based amorphous alloys in a polymeric host

Halit S. Göktürk, Thomas J. Fiske, Dilhan M. Kalyon

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

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 languageEnglish
Pages (from-to)5598-5600
Number of pages3
JournalJournal of Applied Physics
Volume73
Issue number10
DOIs
StatePublished - 1993

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