Regensburg 2013 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 8: Spin Excitations and Spin Torque
MA 8.3: Vortrag
Montag, 11. März 2013, 10:00–10:15, H23
Imaging of spin transfer torque induced magnetization reversal — •Matthias Buhl1, Jochen Grebing1, Sebastian Wintz1, Jörg Raabe2, Jürgen Fassbender1, and Artur Erbe1 — 1Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany — 2Paul Scherrer Institut, Villigen, Switzerland
Setting the magnetic state of nanostructures can be used for durable information storage. For future applications, this process needs to be developed towards true nanoscale dimensions in order to keep up the miniaturization speed of modern nanoelectronic components. Therefore, new concepts for controlling the state of nanomagnets are currently in the focus of research in the field of nanoelectronics. Here, we demonstrate the magnetic characterization of purely metallic nanopillars placed on a lead that conducts a spin-polarized current at room temperature. The structures are fabricated by means of electron beam lithography. Spin diffusion across the metal-metal (Cu to CoFe) interface between the pillar and the lead causes spin accumulation in the pillar, which may then be used to set the magnetic orientation of the pillar. Reproducible switching of the magnetization of the pillar is observed by direct imaging via scanning transmission x-ray microscopy (STXM).