ACTA

Influence of the Production Method on Magnetization Processes of the Fe₆₁Co₁₀Y₈Mo₁B₂₀ Bulk Amorphous Alloys

M. Nabiałek^a, A. Dobrzańska-Danikiewicz^b, P. Pietrusiewicz^a, Z. Stradomski^a, M. Dośpiał^b, M. Szota^a, J. Gondro^a and S. Lesz^b
^aFaculty of Materials Processing Technology and Applied Physics, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
^bFaculty of Mechanical Enginering, Silesian Technical University, al. Konarskiego 18a, 44-100 Gliwice, Poland

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The aim of this paper was to show the influence of the manufacturing method of bulk amorphous alloys on the resulting magnetization processes. Samples in the form: of plates were prepared by the injection or suction of liquid alloy into a copper mould. In order to determine the type and quantity of structural defects present in the bulk amorphous alloys, the indirect method, i.e. the approach to the ferromagnetic saturation, was applied. Studies revealed the presence of conglomerates of point defects, for both alloys. These defects were pinning sites of domain walls and their number, size and type was found to have a direct impact on the coercive field. Alloy produced by the suction-casting method was found to possess the highest number of these defects, and thus a higher coercive field value.

DOI: 10.12693/APhysPolA.126.112
PACS numbers: 61.43.Dq, 75.60.Ej, 75.50.Vv, 75.30.Cr