Dresden 2009 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 11: Magnetic Materials
MA 11.9: Vortrag
Montag, 23. März 2009, 17:30–17:45, HSZ 103
Hard X-ray Standing Wave Photoemission from Multilayer Nanostructures. — •Christian Papp1, Benjamin Balke1, Shigenori Ueda2, Hideki Yoshikawa2, Shao Long He2, Keisuke Kobayashi2, Guiseppina Conti3, Daniel Buergler4, Claus Schneider4, Sven Doering5, Ulf Berges5, Carsten Westphal5, and Charles S. Fadley1 — 1Lawrence Berkeley National Laboratory, CA, USA — 2SPring 8, Japan — 3Applied Materials, CA, USA — 4Forschungszentrum Juelich — 5Lehrstuhl für Physik E1, Uni Dortmund
We have used x-ray standing wave excitation of photoelectrons to study buried layers and interfaces in multilayer nanostructures. In particular, measurements carried out at SPring 8 with 6 keV photon energy will be emphasized. The samples were grown on synthetic multilayer mirrors and the x-ray incidence angle was tuned to the 1st order Bragg reflection. Scanning angle, photon energy, or distance along a wedge profile in the sample permits scanning the resultant standing wave field through nm-scale structures and analyzing the depth distribution of their structural, chemical, electronic, and magnetic properties. Using hard x-ray excitation permits via the higher kinetic energy of the electrons studying those properties at greater depths. The systems discussed will be related to integrated circuit production (titanium nitride on silicon) and to a magnetic tunnel junction (in particular, the electronic properties of the Fe/MgO interface).