Magnetization Processes in Nanocrystalline Pr-(Fe,Co)-(Zr,Nb)-B Magnets
K. Pawlik
Department of Physics, Faculty of Production Engineering and Materials Technology, Częstochowa University of Technology, al. Armii Krajowej 19, 42-200 Częstochowa, Poland
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In the present studies the magnetic interactions and magnetization reversal processes were analyzed based on the measurements of recoil curves. The investigated samples were the nanocrystalline 0.5 mm and 1 mm thick plates of the Pr9Fe50Co13Zr1Nb4B23 alloy, devitrified from the as-cast state at various temperatures from 923 K to 1033 K for 5 min. Phase structure analysis has shown similar phase constitution of the samples, however, the volume fraction of constituent phases and their crystallite sizes were different depending on the thickness of the samples annealed at particular temperature. Magnetic measurements have also shown the hard magnetic properties of the annealed specimens. However, their magnetic parameters were different for specimens of various thicknesses. In order to get better insight into the magnetization processes the δM plots and switching field distributions were analyzed for all investigated specimens.

DOI:10.12693/APhysPolA.138.192
topics: permanent magnets, rapid solidification, magnetization reversal