ACTA

Study of Reversible and Irreversible Magnetization Processes Proportions of Fe-MgO Soft Magnetic Composites

M. Jakubčin^a, Z. Birčáková^b, P. Kollár^a, J. Füzer^a, R. Bureš^b, M. Fáberová^b
^aInstitute of Physics, Faculty of Science, P.J. Šafárik University, Park Angelinum 9, 04154 Košice, Slovakia
^bInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04001 Košice, Slovakia

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Fe based soft magnetic composite samples with 2 wt%, 3 wt% and 5 wt% of MgO insulator particles were prepared. The magnetic field dependence of the differential and the reversible permeability were measured for all samples by modified DC hysteresisgraph. Subsequently, we determined the irreversible permeability, and calculated the proportions between reversible and irreversible magnetization processes. The study revealed that the lower content of MgO in samples caused the increase of irreversible magnetization processes proportions. It is a result of the lower inner demagnetizing fields, improving magnetic interactions between ferromagnetic particles, leading to higher numbers of active (moveable) domain walls, and hence facilitating the magnetization reversal.

DOI:10.12693/APhysPolA.137.879
topics: soft magnetic composites, reversible permeability, magnetization process