Abstract

Two AuCo metastable crystalline phases (MX1 and MX2) were formed by 300 keV Xe + irradiation at 250 °C of multilayered samples with overall composition around Au 2Co 8. At an early stage of irradiation, MX1 is formed, which transforms to MX2 when the whole multilayer is uniformly mixed. At even higher doses, the overall composition of the mixed film changes as a result of sputtering and MX2 transforms back to MX1. The mechanism of metastable phase formation is discussed.

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