Abstract
Thermal expansion of vapor-quenched itinerant-electron ferromagnetic amorphous Hf1-xTaxFe2 alloys for 0≦x≦1 has been measured from 20 to 300 K. A positive anomaly has been clearly observed for x=0 at about and below the Curie temperature. Its magnitude decreases with increasing x and almost disappears for x>0.7. These results have been discussed on the basis of the effect of spontaneous volume magnetostriction due to the ferromagnetic moment.