Dresden 2003 – wissenschaftliches Programm
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MA: Magnetismus
MA 14: Poster: Schichten(1-31), Spinabh.Trsp.(32-47), Exch.Bias(48-54), Spindyn.(55-64), Mikromag.(65-76), Partikel(77-88), Oflmag.(89-92), Spinelektr.(93-98), Elektr.Theo.(99-103), Mikromag+PhasÜ+Aniso.(104-122), MagnMat.(123-134), Messm+Mol-Mag.(135-139), Kondo(140-151)
MA 14.17: Poster
Dienstag, 25. März 2003, 15:15–19:15, Zelt
Structure and magnetic properies of [Fe(1ML)/Pt(1ML)]n epitaxial superlattices on GaAs(001) — •Ellen Schuster1, Masaki Doi2, Werner Keune1, Till Schmitte3, Alexei Nefedov3, Safak Gök3, Katharina Theis-Bröhl3, and Harmut Zabel3 — 1Angew. Phys., Gerhard-Mercator-Universität, 47048 Duisburg, Germany — 2Department of Materials Science and Engineering, Nagoya University, Nagoya, Japan — 3Exp. Phys. / Festkörperphys., RUB, 44780 Bochum, Germany
Perpendicular magnetized thin films on semiconductors are interesting for applications. We have prepared epitaxial [Fe(1ML)/Pt(1ML)]n superlattices on GaAs(001) (4x6) surfaces at different growth temperatures, TS, by MBE. RHEED demonstrated epitaxial growth of [Fe(1ML)/Pt(1ML)]n on a Fe(4.3Å )- or Fe(30Å )-seeded Pt(60Å) buffer layer. Oscillating behavior of the in-plane atomic distance was observed during the growth by RHEED intensity profile analysis. The L10-type layer structure and its order parameter were inferred from X-ray diffraction. Magnetic properties were investigated by Mössbauer spectroscopy (CEMS). Although the magnetically split CEMS spectra showed a rather large linewidth that indicates some atomic disorder, perpendicular magnetization was confirmed at room temperature. In addition, polar MOKE studies have been performed, where perpendicular remanence and large coercivity (≥ 2kOe) can be observed. MFM images indicate stripe domains and confirm the CEMS and MOKE results.
We acknowledge founding by DFG, SFB 491.