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Nb diffusion in ferromagnetic α-Fe

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Abstract

The effect of the magnetic ordering on the diffusion of Nb in α-Fe was investigated. Measurements were made in the 673–1073 K temperature range using secondary ion mass spectrometry as analysis tool. By expanding the temperature range with respect to the previous works, the Arrhenius plot shows the variation of the slope at the Curie temperature and a soft-upward curvature in the ferromagnetic region. The curvature observed is well fitted by the model developed by Ruch et al. The parameter that takes into account the influence of the magnetic order in the vacancy formation and mobility during the Nb diffusion process is quite similar to that observed in other non-magnetic diffusers. A possible explanation for such an effect is given, supported by ab initio calculations.

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Authors and Affiliations

  1. Departamento de Materiales, Comisión Nacional de Energía Atómica (CNEA), Avenida del Libertador 8250, 1429, Buenos Aires, Argentina

    R.A. Pérez

  2. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina

    R.A. Pérez

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  1. R.A. Pérez
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Correspondence to R.A. Pérez.

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PACS

66.30.-h; 66.30.J-; 67.80.dk; 85.40.Ry

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Pérez, R. Nb diffusion in ferromagnetic α-Fe. Appl. Phys. A 92, 325–328 (2008). https://doi.org/10.1007/s00339-008-4520-4

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  • DOI: https://doi.org/10.1007/s00339-008-4520-4

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