抄録
Ordering process of iron rich Fe–Al alloys has been investigated at elevated temperatures by mean of Mössbauer spectroscopy. The observed spectra are analyzed to obtain the temperature dependences of the internal field, isomer shift and line width, and the results are discussed in connection with the ordering process. The alloy with 24.7 at% Al exhibits spectra, which are characteristic of the superposition of a single-line spectrum and a six-line one, originating from the ordered para-magnetic B2 or DO3 state and disordered ferromagnetic α, respectively, and the results confirm the coexistence of α phase with B2 or DO3. The isomer shift of the paramagnetic component of the spectra shows discontinuous changes at the temperatures of transformation α\
ightleftarrowsB2 and B2\
ightleftarrowsDO3.
