Invar characteristics of amorphous (Fe,Co and Ni)-Zr alloys

A detailed investigation on the thermal expansion, magnetic properties and electrical resistance of rapidly quenched amorphous (Fe,Co,Ni)-Zr alloys has been undertaken. Magnetic properties of these alloys are reported separately in this conference. The thermal expansion curves exhibit typical invar characteristics below the Curie temperature due to positive spontaneous volume magnetostriction us similar to those for Fe-Ni crystalline invar alloys. The reduced magnetization decreases strongly with increasing temperature being analogous to the case of other amorphous invar alloys. Moreover, wsat 0 K and electrical resistance at room temperature and Liq. N2temperature increase in the invar region. Amorphous ternary alloys of (Fe,Co, Ni)90Zr10with about 72 at% Fe have the invar characteristics in a wide temperature range and in this composition range, the volume magnetostriction and electrical resistance show maximum values of about 1.5 × 10^-2and 160 μΩcm respectively.