Two magnetic phases in the Fe20Co30Cu50 solid solution

The magnetic property of supersaturated [Fe.sub.20][Co.sub.30][Cu.sub.50] solid solution, prepared by mechanical alloying, has been investigated by using magnetometry, Mossbauer spectroscopy and inelastic neutron scattering measurements. Magnetization measurement of the alloy could be analysed by ferromagnetism only. However, Mossbauer spectroscopy and inelastic neutron scattering experiment showed that not only ferromagnetic phase but also paramagnetic phase of about 12% coexist in the alloy. Spin wave stiffness constant obtained from the analysis of the temperature dependence of magnetization was similar to the value obtained from analysis of inelastic neutron scattering experiment.