Regensburg 2013 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 15: Poster Session

MM 15.64: Poster

Montag, 11. März 2013, 18:00–20:00, Poster E

Optimization of Fe/MgO/Fe Interfaces by Atom Probe Tomography — •Rabab Bahabry, Torben Boll, Ryota Gemma, and Talaat Al-Kassab — King Abdullah University of Science & Technology, Division of Physical Sciences and Engineering, Thuwal, 23955-6900, Kingdom of Saudi Arabia

As part of an emerging nanotechnology, devices based on the Tunnel Magneto-Resistance (TMR) effect have promising applications. The metal/oxide interfaces govern the magnetic properties of such multilayer structures. Hence, Atom Probe Tomography (APT) and STEM investigations help clarifying any chemical or structural inhomogeneity of these layer structures. In this paper Fe/MgO/Fe layer structures were deposited on Si-microtip coupons and W-tips by various ion beam sputtering techniques. Results obtained on several samples with differing deposition conditions utilizing the local electrode atom probe LEAP 4000 HR, which was installed recently at the King Abdullah University of Science & Technology. Results are presented and discussed in view of the influence of deposition conditions on the quality of prepared multilayer stacks.