ACTA

Phase Structure and Magnetic Properties of Fe-Nb-B-Pt Type of Bulk Nanocrystalline Alloys

G. Ziółkowski^a, A. Chrobak^a, N. Randrianantoandro^b, J. Klimontko^a
^aInstitute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
^bLUNAM Université- Université du Maine, Institut des Molécules et des Matériaux du Mans UMR CNRS 6283, Avenue Olivier Messaien, 72085 Le Mans cedex 9, France

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The paper refers to magnetic and structure properties of the (Fe₈₀Nb₆B₁₄)_1-xPt_x (x=0.15, 0.3, 0.4 and 0.6) bulk nanocrystalline alloys prepared using the vacuum suction casting technique. The samples were in the form: of rods with diameters ranging from 0.5 mm to 1.5 mm. It was shown that the optimal Pt content is x=0.4 with the coercive field equal to 0.2 T and maximum energy product |BH|_max=11.2 kJ/m³. The magnetic properties can be associated with Fe-Pt, Fe and Fe-B phases, depending on the alloy composition.

DOI: 10.12693/APhysPolA.126.174
PACS numbers: 81.07.Bc, 75.50.Tt, 75.60.76.80.+y