Dresden 2011 – scientific programme

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MA: Fachverband Magnetismus

MA 19: Poster I (Bio- and Molecular Magnetism/ Magnetic Particles and Clusters/ Micro- and Nanostructured Magnetic Materials/ Magnetic Materials/ Multiferroics/ Magnetic Shape Memory Alloys/ Electron Theory of Magntism/ Spincaloric Transport/ Magnetic Coupling and Exchange Bias/ Magnetization Dynamics/ Micromagnetism and Computational Magnetics)

MA 19.15: Poster

Tuesday, March 15, 2011, 10:45–13:00, P2

Imaging of spin-torque induced magnetization dynamics in lateral spin injector configuration — •Matthias Buhl¹, Kerstin Bernert¹, Sebastian Wintz¹, Tom Henschel¹, Roland Mattheis², Jörg Raabe³, Jochen Grebing¹, Kay Potzger¹, Artur Erbe¹, and Jürgen Fassbender¹ — ¹Helmholtz Zentrum Dresden Rossendorf, Bautzner Landstraße 400, 01328 Dresden, Germany — ²Institut für Photonische Technologien e.V., Postfach 100239, 07702 Jena, Germany — ³Swiss Light Source, Paul Scherrer Institut, 5232 Villigen, Switzerland

Electrical transport characteristics of structures consisting of normal metals and ferromagnetic materials depend strongly on the magnetization direction of the ferromagnets. Thus, different spin polarizations can lead to different resistance values of such structures. The absorption of spin polarized electrons in a ferromagnetic material (spin transfer torque) by domain/domain walls leads to magnetization switching or domain wall movement. This can be achieved by driving a current perpendicular to the plane of the ferromagnet (CPP) or in the plane (CIP). In this experiment we investigate the magnetization behavior of ferromagnetic nanopillars located between two lateral spin injectors in the CIP configuration. Using Scanning Transmission X-ray Mircoscopy (STXM) these studies will give more insights in the switching behavior and dynamics. Technological applications can mostly be found in memory structures, where the magnetization can be stored and read out.