Functional Properties and Microstructure Development of Micro-Nano Fe/MgO Composite
R. Bureša, M. Fáberováa, Z. Birčákováa, P. Kollárb, J. Füzerb, M. Jakubčinb, P. Slovenskýb
aInstitute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovak Republic
bInstitute of Physics, Faculty of Science, Pavol Jozef Šafárik University in Košice, Park Angelinum 9, 041 54 Košice, Slovak Republic
Received: January 23, 2019; revised version January 13, 2020; in final form January 23, 2020
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Micro-nano soft magnetic composite Fe/xMgO was prepared by press and sinter method. The microstructure and functional properties were investigated in dependence on particle size of MgO, as well as on MgO content ratio. Changes of electrical and magnetic properties were clarified on the background of the microstructure development. Particle size of the dielectric MgO phase significantly influenced the densification process, as well as the quality of insulation of each Fe particle from the others, hence the magnetic properties of composite. Significant influence of MgO particle size was observed at frequency of 1 MHz. Value of real part of complex permeability increased with increasing MgO particle size in this order: 10 nm, 1000 nm and the highest value was achieved in Fe/3MgO with 30 nm MgO particles.

DOI:10.12693/APhysPolA.137.283
PACS numbers: 81.05.-t, 75.50.-y, 62.20.-x