Evaporation mechanisms of MgO in laser assisted atom probe tomography

Baishakhi Mazumder, Angela Vella, Bernard Déconihout, Tala'at Al-Kassab

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

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.
Original languageEnglish (US)
Pages (from-to)571-575
Number of pages5
JournalUltramicroscopy
Volume111
Issue number6
DOIs
StatePublished - May 2011

ASJC Scopus subject areas

  • Instrumentation
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials

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