X-ray diffraction, Mossbauer and magnetization studies of nanocrystalline Fe33Ge67 alloy prepared by mechanical alloying

The nanocrystalline Fe33Ge67 alloy was prepared by mechanical alloying and its formation was followed by X-ray diffraction, Fe-57 Mossbauer spectroscopy and magnetization techniques. The room-temperature Mossbauer spectra revealed the formation of a broad single line at the expense of the area of the alpha-Fe sextet. Combination of the measured room-temperature saturation magnetization values together with those for the area of alpha-Fe sextet has shown that the consume of the alpha-Fe for the formation of the Fe33Ge67 alloy follows a linear relationship. Low-temperature Fe-57 Mossbauer spectroscopy reveals the well-known antiferromagnetic ordering of the Fe33Ge67 phase and the possible existence of superparamagnetic particles of Fe33Ge67.