Fe and N diffusion in nitrogen-rich FeN measured using neutron reflectometry |
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Authors: | Mukul Gupta A. Gupta A. Wildes T. Gutberlet |
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Affiliation: | (1) UGC-DAE Consortium for Scientific Research, R-5 Shed, Bhabha Atomic Research Centre, Mumbai, 400 085, India;(2) UGC-DAE Consortium for Scientific Research, Khandwa Road, Indore, 452 017, India;(3) Institut Laue-Langevin, rue des Martyrs, 38042 Grenoble Cedex, France;(4) Laboratory for Neutron Scattering, ETH Zürich and Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland |
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Abstract: | Grazing incidence neutron reflectometry provides an opportunity to measure the depth profile of a thin film sample with a resolution <1 nm, in a non-destructive way. In this way the diffusion across the interfaces can also be measured. In addition, neutrons have contrast among the isotopes, making it feasible to measure the self-diffusion. In the present work, the isotope multilayers of [FeN/57FeN]10 and [FeN/Fe15N]10 were prepared using magnetron sputtering and self-diffusion of Fe and N was investigated. It was found that N diffusion is slower compared to Fe and does not follow the atomic size dependence. |
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Keywords: | FeN iron nitride reactive sputtering self-diffusion neutron reflectometry |
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