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Compositional and structural medium energy ion scattering study of the temperature mediated diffusion determination at the Co/V interface in Co/V/MgO(100)

DOI: 10.1016/j.susc.2010.09.011 DOI Help

Authors: M. Diaz (Instituto de Ciencia de Materiales de Madrid (CSIC-ICMM)) , L. Martinez (Instituto de Ciencia de Materiales de Madrid (CSIC-ICMM)) , E. Roman (Instituto de Ciencia de Materiales de Madrid (CSIC-ICMM)) , A. Redondo-cubero (Universidad Autónoma de Madrid) , M. Muñoz-márquez (Instituto de Ciencia de Materiales de Sevilla, (CSIC-US)) , G. Van Der Laan (Diamond Light Source) , N. D. Telling (Institute for Science and Technology in Medicine (ISTM), Keele University) , P. Bailey (STFC Daresbury Laboratory) , T. C. Q. Noakes (STFC Daresbury Laboratory) , Y. Huttel (Instituto de Ciencia de Materiales de Madrid (CSIC-ICMM))
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Surface Science

State: Published (Approved)
Published: October 2010

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.

Journal Keywords: Medium energy ion scattering (MEIS); Interdiffusion; Interface; Composition; Layer; Structure; Disorder

Subject Areas: Physics


Technical Areas: Theoretical Physics

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