Compositional and structural medium energy ion scattering study of the temperature mediated diffusion determination at the Co/V interface in Co/V/MgO(100) |
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| Authors: | M. Díaz L. Martínez E. Román A. Redondo-Cubero M.A. Mu?oz-Márquez G. van der Laan N.D. Telling P. Bailey T.C.Q. Noakes Y. Huttel |
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| Affiliation: | 1. Instituto de Ciencia de Materiales de Madrid (CSIC-ICMM), Cantoblanco, 28049 Madrid, Spain;2. Centro de Micro-Análisis de Materiales, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain;3. Instituto de Ciencia de Materiales de Sevilla, (CSIC-US), Av. Américo Vespucio 49, 41092, Sevilla, Spain;4. Diamond Light Source, Chilton, Didcot, Oxfordshire OX11 0DE, UK;5. Institute for Science and Technology in Medicine (ISTM), Keele University, UK;6. STFC Daresbury Laboratory, Warrington WA4 4AD, UK |
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| Abstract: | The impact of annealing at 300 °C on the elemental composition and the atomic structure of the Co/V interface in the 2.5 Å Co/70 Å V/MgO (100) system has been investigated by medium energy ion scattering (MEIS) using 100 keV He+ ions. By combining the experimental MEIS results with simulations we show that, while the Co/V interface is abrupt for the system kept at room temperature, annealing at 300 °C induces a strong interdiffusion leading to a Co0.5V0.5 surface bcc alloy with a high degree of disorder. Additionally, the MEIS data suggest that the surface of the annealed system is slightly rumpled by ~ 0.2 Å. |
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