Berlin 2005 – wissenschaftliches Programm

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MA: Magnetismus

MA 18: Magnetische dünne Schichten III

MA 18.8: Vortrag

Montag, 7. März 2005, 12:15–12:30, TU H1028

Permalloy microstructures at high current densities — •Saleh Getlawi, Ivo Knittel, Michael Koblischka, and Uwe Hartmann — Universität des Saarlandes, 66041 Saarbrücken

It is now less than ten years that magnetization reversal by spin transfer and current-induced domain wall movement has been discovered. Now it is discussed more and mor as a possible mechanism for devices, namely as microwave generator and for permanent information storage. However, the current densities involved are without precedent in technology. We have set up a number of experiments to observe the effects of high current densities on permalloy microstructures. We investigate current-induced domain wall movement by magnetic force microscopy, map the local temperature distribution by Near-Infrared Scanning Near Field Microscopy, and study the effects of electromigration by atomic force microscopy and electron microscopy.