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Ion mixing to synthesize amorphous and metastable crystalline alloys in the Fe-Ta system

Formations of metastable phase in the Fe-Ta system upon ion irradiation are sensitive to the entire composition of the initial multilayered films and ion irradiation dose. Amorphization was achieved at high irradiation dose in the Fe35Ta65 multilayered films, which was in the vicinity of the deep eutectic point. A metastable face centred cubic (fcc) phase was, however, observed at low irradiation dose in the same sample. Detailed examination showed that the fcc phase had a composition of about Fe20Ta80.