Saturation Magnetostriction and Volume Magnetostriction of Fe-Ni-Co Amorphous Ribbons(Metallurgy)

The saturation magnetostriction and the volume magnetostriction in amorphous ribbons of Fe-Ni-Co system were measured from 77K to room temperature, by a three terminal capacitance method. The ternary diagram were given of the saturation magnetostriction and volume magnetostriction in (Fe_xCo_yNi_) _Si_8B_ system. It was found that the largest saturation magnetostriction constant is 36×10^ for the composition Fe_Co_Si_8B_ at room temperature. The temperature dependence of the saturation magnetostriction and the volume magnetostriction in Fe-Ni-Co system were not a simple function of the temperature. The maximum value of volume magnetostriction δω/δH was observed for Fe_Si_8B_ to be 24×10^ Oe^ at room temperature