Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 91: [MA] Poster II
O 91.22: Poster
Freitag, 30. März 2012, 11:00–14:00, Poster A
X-ray absorption and magnetic circular dichroism of perpendicular Mn3−xGa thin films — •Daniel Ebke, Manuel Glas, Jan Schmalhorst, Markus Meinert, Patrick Thomas, and Günter Reiss — Thin Films and Physic of Nanostructures, Bielefeld University, 33615 Bielefeld, Germany
Recently, the integration of materials with perpendicular magnetic anisotropy into magnetic tunnel junctions (MTJs) has found a lot of attraction due to the predicted lower current densities for spin torque switching and higher thermal stability. Especially, the interface of the electrodes to the tunnel barrier play a key role for the realization of MTJs with high tunneling magneto resistance (TMR) ratios. In this work, we have investigated the chemical and magnetic interface properties of perpendicular magnetized Mn3−xGa (x=0-1) thin films for MgO based MTJs as a function of deposition temperature and stoichiometry. The results will be compared to the corresponding magnetic bulk properties and the crystallographic ordering.