ACTA

The Influence of NiZnFe₂O₄ Content on Magnetic Properties of Supermalloy Type Material

L'. Ďáková^a, J. Füzer^a, S. Dobák^a, P. Kollár^a, M. Fáberová^b, M. Strečková^b, R. Bureš^b and H. Hadraba^c
^aInstitute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
^bInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
^cCEITEC IPM, Institute of Physics of Materials ASCR, Žižkova 513/22, 616 62 Brno, Czech Republic

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Soft magnetic composites represent a remarkable kind of materials with wide variety of use. Magnetic properties are dependent on the materials composition and also on the method of preparation. Ni-Fe-Mo alloys (supermalloy) have high complex permeability and low eddy current losses. Soft magnetic NiZnFe₂O₄ ferrites have low coercivity and intermediate saturation magnetization. The Ni₈₀Fe_14.7Mo_4.5Mn_0.5Si_0.3 (wt%) powder sample was prepared by mechanical alloying of the chemical elements for 24 h. Ni_0.3Zn_0.7Fe₂O₄ ferrite is commercially available by Sigma Aldrich. Both powders were mixed at selected ratio and uniaxially compacted at 800 MPa. In this paper, we report the experimental observations of the effects of Ni_0.3Zn_0.7Fe₂O₄ content on the electromagnetic properties of NiFeMoMnSi/Ni_0.3Zn_0.7Fe₂O₄. The samples contained 5, 10, and 15% of Ni_0.3Zn_0.7Fe₂O₄ ferrite and were sintered for 30 min at 800°C. An addition of Ni_0.3Zn_0.7Fe₂O₄ ferrite caused decrease of complex permeability and increase coercivity of the samples. The 5% of Ni_0.3Zn_0.7Fe₂O₄ sample exhibits the highest value of the real part of complex permeability (48 at 1 kHz). The 10% of Ni_0.3Zn_0.7Fe₂O₄ sample showed the lowest total magnetic losses.

DOI: 10.12693/APhysPolA.131.813
PACS numbers: 07.55.-w, 75.60.-d, 75.50.Bb, 75.50.Gg