MOSSBAUER EFFECT AND NEUTRON DIFFRACTION OF FE65(NI1-XMNX)35 ALLOYS

The Mössbauer effect and the neutron diffraction were measured in disordered Fe65(Ni1-xMnx)35 alloys. The Mössbauer effect experiments revealed that the internal field acting on iron nuclei is about 300 kOe in ferromagnetic alloys and changes abruptly to about 45 kOe in antiferromagnetic alloys in which the internal field is nearly independent on concentration. These results are consistent with a previously proposed model that the electronic state of iron atom in the ferromagnetic alloys is considerably different from that in the antiferromagnetic ones. The neutron diffraction experiments indicated the cubic spin structure is these alloys. The sublattice moment was found to be nearly constant from x =1.0 to 0.7 and to decrease sharply at around x =0.6 with decreasing x. © 1969, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.