Regensburg 2002 – wissenschaftliches Programm
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MA: Magnetismus
MA 10: Poster : Dünne Schichten(1-21),Spinabh.Transp.(22-39),Exch.Bias(40-51),Spindyn.(52-55),Mikromag.(56-66),Partikel(67-74),Abb.Verf.(75-77),Oberfl.+Spinelektr.+Elektr.Theo+Mikromag(75-87),PÜ+Aniso+Werkst/Leg.(88-103),Mol.Mag.+N-dim+Messm.+Postdead(104-111
MA 10.56: Poster
Dienstag, 12. März 2002, 15:00–19:00, Bereich A
MOKE study of the anisotropy of Fe nanowires — •Till Schmitte1, Katharina Theis-Bröhl1, Vincent Leiner1, Safak Gök1, Hartmut Zabel1, and Siegfried Kirsch2 — 1Institut für Experimentalphysik / Festkörperphysik, Ruhr-Universität Bochum, Germany — 2Institut füer experimentelle Tieftemperaturphysik, Gerhard-Mercator-Universiät Duisburg, Germany
In view of the ever-expanding field of magneto-electronics, the identification and characterization of appropriate experimental tools for the investigation of re-magnetization processes in nano-wires or dots is of vital importance. In this context we examine the magnetization process of Fe nanowires with the external field applied in different directions to the stripes. The Fe stripes of 100nm width form an array with a lattice parameter of 300 nm. The stripes were ion etched into a 13 nm thick polycrystalline Fe film, the etching mask was fabricated using the laser interference lithography method. The magnetic investigations were carried out using the longitudinal magnetooptical Kerr effect (MOKE), which reveals a strong uniaxial anisotropy induced by the patterning process. In order to investigate the magnetization process, MOKE measurements with a perpendicular magnetic field were performed, which exhibit the transverse magnetization component. The setup is able to detect the absolute value of the Kerr rotation, which enables us to calculate the length and angle of the magnetization vector as a function of the external field. The poster displays these measurements and compares the results with other methods, e.g. SQUID and polarized neutron scattering. We acknowledge financial support through SFB 491.