Regensburg 2007 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 15: Poster:ThinFilms(1-33),Transp.(34-49),ExchBias(50-56),
Spindynamics(57-70),Micro-nanostr.Mat.(71-82),
Particles/Clust.(83-88), Mag.Imag./Surface(89-96),
Spinelectronics(97-109), Theory/Micromag.(110-116),
Spinstruct/Phasetr.(117-128),Magn.Mat.(129-139),
Aniso.+Measuring(140-145), MolMag.(146-152),
MSMA(153-156)
MA 15.58: Poster
Dienstag, 27. März 2007, 15:00–19:00, Poster A
Domain wall motion in perpendicularly magnetized (Co/Pt)n-multilayer-wires — •Christoph Hassel1, Jan Rhensius2, Theo Kleinefeld2, Jürgen Lindner1, and Günter Dumpich1 — 1Fachbereich Physik, AG Farle, Universität Duisburg-Essen, Lotharstrasse 1, 47048 Duisburg — 2Fachbereich Physik, Angewandte Physik, Universität Duisburg-Essen, Lotharstrasse 1, 47048 Duisburg
We prepare (Co/Pt)n-multilayer wires by means of a two step electron beam lithography process. The magnetization reversal process of (Co/Pt)n-multilayer-wires with perpendicular magnetic anisotropy is investigated with an optical Kerr Microscope. Different structures are used so that we can nucleate domain walls in the wire using the application of external magnetic fields. The wires are contacted with nonmagnetic gold wires, which allows us to inject currents into the wire. To move the domain walls we use pulsed currents with current densities of up to 108 A/cm2. Sample heating is controlled my measuring the resistance during the application of the pulses. We carried out experiments as well with additional application of small magnetic fields as without external magnetic field. Results are discussed in terms of the spin-transfer-torque effect.
This work is financially supported within SFB 491.