Regensburg 2004 – scientific programme
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MA: Magnetismus
MA 13: Poster:Schichten(1-23),Spinabh.Trsp(24-41),Exch.Bias(42-56),Spindyn.(57-67),Mikromag.(68-76),Partikel(77-90),Spinelektr.(91-97),Elektr.Theo.(98-99),Mikromag+PhasÜ+Aniso.(100-105),Magn.Mat.(106-118),Messmethod.(119-121),Obflm.+Abbverf.(122-123)
MA 13.71: Poster
Tuesday, March 9, 2004, 15:00–19:00, Bereich A
Single crystalline epitaxial Mo(110) strip-line for time resolved observation of magnetization dynamics. — •D.A. Valdaitsev, J. Prokop, A. Kukunin, H.J. Elmers, and G. Schönhense — Johannes Gutenberg-Universität Mainz, Institut für Physik, Staudingerweg 7, D-55099 Mainz
Single crystalline Mo(110) strip-lines have been prepared on α-Al2O3(1120). They are dedicated for temporally and spatially resolved observation of magnetization dynamics of thin epitaxial magnetic films. On the strip-line substrate, epitaxial Co(0001) film was deposited in UHV by molecular beam epitaxy and subsequently covered by a Au capping. The structure of the Mo(110) strip-line and the Co layer were investigated using low energy electron diffraction. Atomic force microscopy and scanning tunneling microscopy (STM) were used for the morphology characterization and the magnetic properties of Co were investigated ex-situ using magneto-optical Kerr magnetometry. The STM measurements showed monoatomic terraces of widths varied between 10 and 200 nm on the molybdenum surface. The quality of the obtained strip-line substrate is similar to single crystal Mo substrates. The epitaxial hcp Co layer grown on the strip-line reveals a uniaxial in-plane magnetic anisotropy. The magnetic easy axis lies in [1100] direction parallel to Mo[110], while the hard axis shows along Mo[001] direction. We demonstrate that the epitaxial Co films grown on the strip-line are appropriate for investigations with spin-polarized low energy electron microscopy (SP-DREEM). We show first images of these samples taken with SP-DREEM in diffraction and real-image modes.