Abstract
The Mössbauer spectra of Zr films evaporated on Fe substrates (Zr/Fe) and Fe films on Zr substrates (Fe/Zr) were measured after heat treatments following evaporation. Fe2Zr was detected in the interfaces of both Zr/Fe and Fe/Zr films after heat treatments above 900°C, while, FeZr3 was detected in the Fe/Zr films treated below 900°C. FeZr2 was not detected in both films but FeZr2Ox was observed in Fe/Zr films annealed at 1000°C. The relative amounts of intermetallic phases, which were formed at interfaces, suggest that diffusion of Zr atoms into the Fe substrates mainly occurs in Zr/Fe, whereas diffusion of Fe atoms into Zr substrates is a major process for making intermetallic compounds in Fe/Zr at rather low temperatures.
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