Abstract
The magnetostriction of Fe1-xYx (0.2≤x≤0.6) and (Fe1-x-Cox)0.8Y0.2(0≤x≤0.6) alloys has been measured in the temperature range from 20 to 300 K. In FeY alloys, the magnetostriction λ is 2.8×10-6 at 20K for x=0.2 and shows a monotonic decrease with increasing x and temperature; this magnetostriction of the Fey alloys is the smallest in the Fe-based amorphous binary alloys investigated so far. In (Fe1-x-Cox)0.8Y0.2 alloys, λ at room temperature shows a minimum of 1.0×10-6 at x≈0.3, where the magnetization and coercive force are 125 emu/g and 0.05 Oe, respectively.
