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    Evaporation mechanisms of MgO in laser assisted atom probe tomography

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    Type
    Article
    Authors
    Mazumder, Baishakhi
    Vella, Angela
    Déconihout, Bernard
    Al-Kassab, Tala'at
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Date
    2011-05
    Permanent link to this record
    http://hdl.handle.net/10754/561771
    
    Metadata
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    Abstract
    In this paper the field evaporation properties of bulk MgO and sandwiched MgO layers in Fe are compared using laser assisted Atom Probe Tomography. The comparison of flight time spectra gives an estimate of the evaporation times as a function of the wavelength and the laser energy. It is shown that the evaporation takes place in two steps on two different time scales in MgO. It is also shown that as long as the MgO layer is buried in Fe, the evaporation is dominated by the photon absorption in Fe layer at the tip apex. Eventually the evaporation process of MgO is discussed based on the difference between the bulk materials and the multilayer samples. © 2010 Elsevier B.V.
    Citation
    Mazumder, B., Vella, A., Deconihout, B., & Al-Kassab, T. (2011). Evaporation mechanisms of MgO in laser assisted atom probe tomography. Ultramicroscopy, 111(6), 571–575. doi:10.1016/j.ultramic.2010.11.017
    Sponsors
    We acknowledge the ESP Carnot, the TAPAS, the ANR and Cameca France for supporting our work. We thank L. Renaud for provided bulk MgO samples. We would like to thank Ryota Gemma for helping in MgO sample preparation.
    Publisher
    Elsevier BV
    Journal
    Ultramicroscopy
    DOI
    10.1016/j.ultramic.2010.11.017
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.ultramic.2010.11.017
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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