The correlation between the first magnetocrystalline anisotropy constant K1 and the composition of giant magnetostrictive alloy Tb–Dy–Fe

In this paper five J–H curves, the magnetic polarization curves, which are come from five M–H curves, have been given. From these curves, by using the approaching saturation law, the anisotropy constants of corresponding alloys have been given. And the curve K1–x has been got. The variation of the curve K1–x has been discussed.