High Field Susceptibilities of Ni-Base Face Centered Cubic Alloys up to the Magnetic Field of 300 kOe

Magnetic susceptibility measurements have been made by using a pulse magnet wound with Cu-Be wire, which is connected to a condenser bank of the capacity 3000µF. Susceptibilities observed for Fe-Ni, Fe-Ni-Cr alloys show anomalous increase near the Invar region. For Ni-Co alloys observed values are small (2 ×10 -5 emu/cc), and for Ni-Cu alloys a maximum has been observed at the Ni concentration of 80 at %. These experiments are well explained in terms of the rigid band model.