Critical Exponents Determined for Nickel from Magnetization Measurement in High Magnetic Fields

Magnetization curves were measured for Ni near and above the Curie temperature in magnetic fields up to 160 kOe. By extrapolating linear parts of ( M 2 - H / M ) curves in a high field region, the critical exponents were estimated without being affected by spin clusters. These values are consistent with those expected from the molecular field theory.