The microstructure and magnetic properties of Nd_8.5Tb_1.5Fe₈₃Zr₁B₆ ribbons obtained at various cooling rates

The paper presents results of microstructure and magnetic properties studies of Nd_8.5Tb_1.5Fe₈₃Zr₁B₆ ribbons obtained by melt-spinning technique. The samples were produced using the rapid cooling of liquid alloy on the copper wheel, by applying three different linear velocities 20, 30, and 35 m/s. The microstructure of obtained ribbons was examined using X-ray diffractometry and Mössbauer spectroscopy. Magnetic measurements were performed using LakeShore vibrating sample magnetometer. The microstructure measurements were used for quantitative and qualitative analysis of phase composition. Basing on results of structure studies combined with magnetic measurements, the influence of phase composition on hysteresis loop behavior was described.