Berlin 2012 – scientific programme

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MM: Fachverband Metall- und Materialphysik

MM 17: Poster Session

MM 17.66: Poster

Monday, March 26, 2012, 17:00–19:00, Poster B

Interfaces in Fe/MgO/Fe sandwich structures — •Torben Boll¹, Talaat Al-Kassab¹, Catharina Wille¹, and Ryota Gemma² — ¹King Abdullah University of Science & Technology, Division of Physical Sciences, Thuwal, Kingdom of Saudi Arabia — ²Institut für Materialphysik, Göttingen, Germany

Electronic devices, based on the Tunnel Magneto-Resistance (TMR) effect, which are consisting of multi layered structures, are of emerging interest. The magnetic properties of such multilayer structures are governed by the properties of the metal/oxide interfaces. This paper focuses on Atom Probe Tomography (APT) investigations of the interfaces in such multilayer structures.

Fe/MgO/Fe/Au layer structures were deposited on Si-microtips by Ar-sputtering. The Au-layer is meant to prevent oxidation when the sample is exposed to the air. Results of different thermal treatments will be presented in this study to elaborate the mixing effects at the metal/oxide interface. The APT measurements were performed with the LEAP 4000 HR at the King Abdullah University of Science & Technology.