Neutron diffraction and Mossbauer measurements for magnetism of bcc Cr-Fe-Mn alloys

The successive magnetic transition of BCC Cr sub 65.0 Fe sub 20.0 Mn sub 15.0 alloy has been studied by neutron diffraction and Mossbauer effect measurements. An antiferromagnetic 1 0 0 scattering and the hyperfine field at Fe sites were confirmed to appear just below T sub N by neutron diffraction and Mossbauer effect, respectively. The hyperfine field distribution estimated from the Mossbauer spectra has two peaks below 150K. The amount of Fe atoms for the peak of the high-field part increases with decreasing temperature at around T sub C . The position of the high-field peak shifts remarkably to higher field below T sub g with almost keeping the fractional area for this peak.