ACTA

Effect of Chemical Composition on Curie Temperature of FeCoB Alloys

M. Nabiałek^a, B. Jeż^a, P. Pietrusiewicz^a, K. Jeż^a, B. Płoszaj^a, A.V. Sandu^{b, c}, M.M.A.B. Abdullah^b, J. Wysłocki^a, A. Kalwik^d, P. Postawa^d, M.A.A. Mohd Salleh^b
^aDepartment of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
^bCenter of Excellence Geopolymer & Green Technology (CeGeoGTech), Faculty of Chemical Engineering Technology, Campus Dragon, Complex Pusat Pengajian Jejawi 3, 02600 Arau, Perlis, Malaysia
^cFaculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, Blvd. D. Mangeron 41, 700050 Iasi, Romania
^dDepartment of Technology and Automation, Faculty of Mechanical Engineering and Computer Science, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland

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This paper presents the results of research on saturation magnetic polarisation, as a function of temperature, for a group of rapidly-cooled FeCoB alloys. The tested alloys have soft magnetic properties. Thermal stability, as determined by the Curie temperature, is one of the most important parameters for classifying the use of magnetic materials. In this work, the Curie temperature values for selected alloys were determined, using the critical factor of β=0.36. The area under each saturation magnetic polarisation curve, and the shape of the curve itself, were also analysed. It was found that even small changes in the chemical composition of the alloy can lead to a shift in the temperature that marks the boundary between the ferromagnetic and paramagnetic states.

DOI:10.12693/APhysPolA.139.491
topics: rapidly-quenched alloys, X-ray diffractometry, Curie temperature, injection-casting method