Mössbauer experiments on57Fe in the giant moment system Ni75-x Fe x Ga25

Mössbauer experiments on⁵⁷Fe on the giant moment system Ni_75-x Fe _x Ga₂₅ were performed. For various Fe concentrationsx the hyperfine fields, the isomeric shift, and the quadrupole splitting were measured. A saturation hyperfine field of 223 (2) kOe at the Fe atom substituting a Ga site and of 200 (2) kOe at the Fe atom substituting a Ni site were found.