Low Field Magnetic Properties of FeCo-Based Alloys

M. Hasiaka, M. Miglierinib,c, A. Łukiewskad, J. Kaletaa, J. Zbroszczykd aInstitute of Materials Science and Applied Mechanics, Wrocław University of Technology, Smoluchowskiego 25, 50 370 Wrocław, Poland bInstitute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology in Bratislava, Ilkovičova 3, 812 19 Bratislava, Slovakia cRegional Centre of Advanced Technologies and Materials, Palacky University, 17. listopadu 12, 771 46 Olomouc, Czech Republic dInstitute of Physics, Częstochowa University of Technology, 42 200 Częstochowa, Poland

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Low field magnetic properties of amorphous (FexCo1)76Mo8Cu1B15 alloys (x=3, 6 and 9) were characterized by magnetic after-effect and initial magnetic susceptibility. Activation energies and pre-exponential factors of the Arrhenius law that were derived from the disaccommodation curves are of about 1.188 eV and 10-15 s, respectively. Local magnetic arrangement was investigated by 57Fe Mössbauer spectrometry. The average hyperfine magnetic field decreases with increasing Fe/Co ratio due to smaller relative contribution of cobalt. The overall magnetic parameters of the alloy prove its good soft magnetic properties with an application potential.

DOI: 10.12693/APhysPolA.126.118 PACS numbers: 76.80.+y, 75.50.Kj, 75.60.Lr, 71.55.Jv