Microstructure, magnetic properties, and spontaneous magnetostriction of Tb/sub 0.2/Pr/sub 0.8/(Fe/sub 0.4/Co/sub 0.6/)/sub x/

摘要

The microstructure, magnetic properties and magnetostriction of Tb/sub 0.2/Pr/sub 0.8/(Fe/sub 0.4/Co/sub 0.6/)/sub x/ (1.65/spl les//spl times//spl les/1.90) alloys has been studied. The Curie temperatures for the 1:2 and 1:3 phases decrease with increasing x, whereas the saturation magnetization increases with increasing x. The remanent magnetization remains almost constant for all the samples and the coercivity decreases with increasing x. The spontaneous magnetostriction (/spl lambda//sub 111/) estimated from the splitting of the (440) lines is found to decrease with increasing e. The largest /spl lambda//sub 111/ recorded for Tb/sub 0.2/Pr/sub 0.8/(Fe/sub 0.4/Co/sub 0.61/)/sub 1.65/ is 2900 ppm at room temperature.