Abstract

The magnetic alloys of Cu-Fe (Cu_50Fe_50,;Cu_80Fe_20;and;Cu_90Fe_10) were prepared by a mechanical alloying method and their structural and magnetic behaviors were examined by X-ray diffraction and Mossbauer spectra. The magnetization curves did not distinctly show the saturation at 70 kOe for the concentrated alloys of Cu_80Fe_20;and;Cu_90Fe_10. The Mossbauer spectrum of Cu_80Fe_20 at room temperature shows one Lorentzian line of the paramagnetic phase, whereas the Mossbauer spectrum of Cu_90Fe_10 consists of sextet Lorentzian line at room temperature and a centered doublet line. The Mossbauer spectra of Cu_90Fe_10 measured in the temperature ranges from 13 to 295 K, implies that Cu_90Fe_10 to consists of two magnetic phases. One superimposed sextet corresponds to the ferromagnetic iron in Cu and the other one indicates the superparamagnetic iron rich phase.

• Keywords: Mechanical alloying;Cu-Fe;Hetero structure;;