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 15.65: Poster
Dienstag, 27. März 2007, 15:00–19:00, Poster A
Magnetization dynamics of iron thin film triggered by photoconductive switches — •Zhao Wang1, Anne Parge1, Malte Scherff1, Markus Münzenberg1, and Mihail Ion Lepsa2 — 1IV. physikalische Institut Universität Göttingen — 2Forschungszentrum Jülich(IBN-1)
The photoconductive switches are based on a coplanar waveguide with a metal-semiconductor-metal contact pad using low temperature grown GaAs (LT-GaAs). The carriers in the semiconductor are excited by a Ti:Sapphire Laser with the pulse length 80fs. Because of the short relaxation time of the LT-GaAs, the generated current pulse corresponding magnetic field pulse is in ps range. the pulse length can be defined by the autocorrelation measurenments. the amplitude of the created current pulse can be up to some Ampere corresponding to a magnetic field over 150mT.
The field pulse is used to trigger the magnetization dynamics in an iron thin film on top of the coplanar waveguide, structured wth the help of e-Beam lithography. The dynamic measurements are compared to micromagnetic simulations.
Research supported by DFG SPP 1133.