DC Magnetic Properties and Complex Permeability of Ni-Fe Based Composites
F. Onderkoa, M. Jakubčin a, S. Dobák a, D. Olekšáková b, Z. Birčáková a, P. Kollár a, J. Füzer a, M. Fáberová c, R. Bureš c and P. Kurek c
aInstitute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
bFaculty of Mechanical Engineering, Technical University, Letná 9, 042 00 Košice, Slovakia
cInstitute of Experimental Physics, SAS, Watsonova 47, 040 01 Košice, Slovakia
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We have investigated soft magnetic composite materials to better understand the influence of binder (resin) content on the DC magnetic properties and the complex permeability. Soft magnetic composite samples were composed from NiFe powder with phenol formaldehyde resin (ATM). Ferromagnetic magnetic powder for ring-shaped samples was obtained by milling of small pieces cut of NiFe sheets. The obtained powder was annealed to partially remove structural defects. The prepared powder was mixed with phenol-formaldehyde resin in different vol.%. The mixtures were pressed into the ring-shape samples. Complex permeability and DC magnetic properties (initial magnetization curves, anhysteretic curves and hysteresis loops) were measured. Higher inner demagnetizing fields in the resin containing samples were responsible for higher coercivity and hysteresis losses, but the permeability was stable up to much higher frequencies, compared to the sample without the resin.

DOI: 10.12693/APhysPolA.131.792
PACS numbers: 75.50.Bb, 75.60.Jk, 75.60.-d