Dresden 2006 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
MA: Magnetismus
MA 33: Spin-Dynamics, Magnetization Reversal III
MA 33.2: Vortrag
Donnerstag, 30. März 2006, 15:30–15:45, HSZ 403
Magnetization switching by spin transfer torque in magnetic nanostructures — •Nicolas Müsgens1, Georg Richter1, Barbaros Özyilmaz1,2, Michael Fraune1, Matthias Hawraneck1, Bernd Beschoten1, Matthias Bückins3, Joachim Mayer3, and Gernot Güntherodt1 — 1II. Phyikalisches Institut , RWTH Aachen, and Virtual Institut of Spin Electronics (ViSel), Templergraben 55, 52056 Aachen, Germany — 2Department of Physiks, Columbia University, New York, NY 10027, USA — 3Gemeinschaftslabor für Elektronenmikroskopie, RWTH Aachen, 52056 Aachen, Germany
The transfer of a torque of spin-polarized currents onto macroscopic magnetizations has been investigated in confined magnetic nanostructures. Nanostencil masks are used to define the device dimensions (sub 100 nm2) prior to the deposition of the thin Co/Cu/Co stack with perpendicular current. The masks consist of a focused-ion-beam (FIB) milled nano-aperture in a top metal layer on top of an insulator and an underlying pre-patterned bottom electrode. The insulator causes an undercut by its selective wet etching. The approach is demonstrated by spin transfer torque-induced magnetization dynamics, giving rise to a giant magneto-resistance effect of 0.3 % at room temperature.
Supported by DFG-SPP 1133 and by HGF.