Magnetic properties of melt-spun ribbons (Sm1–xZrx)(Fe0.92Ti0.08)10 with ThMn12 structure and their hydrides

Abstract

The structure and magnetic hysteresis properties of the cast Sm1–xZrx(Fe0.92Ti0.08)10 (x = 0–0.3) alloys and melt-spun ribbons prepared from them were studied. In the cast alloy with x > 0.2, a considerable amount of the eutectic phase is found in the SEM micrographs. Analysis of the temperature dependences of the magnetic susceptibility and XRD patterns allows amorphous state in the as-spun ribbons with x > 0.2 to be determined. The specific magnetization measured in a field of 17 kOe and remanence decrease with increasing annealing temperature from 800 to 900 °C and weakly depend on Zr concentration. The maximal value of coercivity Нс = 4.7 kOe is obtained on the ribbons with х = 0.2 after annealing at 850°С for 10 min. After additional hydrogenation of the ribbons, both the coercivity and remanence increase by 54% and 7%, respectively. © 2019 Chinese Society of Rare Earths