[Fe (3.1 nm)/Ni (3.3 nm)]20 multilayer films were prepared by DC magnetron sputtering onto oxidized Si(100) substrates. The Fe and Ni layers were shown to both be face-centered cubic by x-ray diffraction. Interdiffusion of the Fe and Ni layers in the temperature range of 300–430 °C was studied by x-ray reflectivity. From the decay of the integral intensity of the superlattice peak, the activation energy and the pre-exponential term for the effective interdiffusion coefficient were determined as to 1.06 ± 0.07 eV and 5 × 10−10 cm2/s, respectively. The relevance of the measured interdiffusion coefficient to the laboratory timescale synthesis of L10 ordered FeNi as a rare-earth free permanent magnet is discussed.
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Research Article| January 06 2015
Interdiffusion in nanometric Fe/Ni multilayer films
Jiaxing Liu, Katayun Barmak; Interdiffusion in nanometric Fe/Ni multilayer films. J. Vac. Sci. Technol. A 1 March 2015; 33 (2): 021510. https://doi.org/10.1116/1.4905465
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