AVS 51st International Symposium
    Magnetic Interfaces and Nanostructures Wednesday Sessions
       Session MI-WeM

Paper MI-WeM1
Structural and Magnetic Properties of Ultrathin Co Film Grown on Pt(100)

Wednesday, November 17, 2004, 8:20 am, Room 304A

Session: Magnetic Nanostructures
Presenter: W.D. Kim, Univ. of California at Berkeley and KRISS, Korea
Authors: M.H. Pan, The Chinese Academy of Sciences, China
K. He, The Chinese Academy of Sciences, China
L.J. Zhang, The Chinese Academy of Sciences, China
J.F. Jia, The Chinese Academy of Sciences, China
Q.-K. Xue, The Chinese Academy of Sciences, China
W.D. Kim, Univ. of California at Berkeley and KRISS, Korea
Z.Q. Qiu, Univ. of California at Berkeley
Correspondent: Click to Email
Ultrathin Co films were deposited on Pt(100) at room temperature in ultrahigh vacuum, and investigated in situ by Low Energy Electron Diffraction (LEED), Scanning Tunneling Microscopy (STM), and Surface Magneto-Optiic Kerr Effect (SMOKE). The Co film was grown into a wedged shape to provide a continuous change of the film thickness. We find that the Co film forms single crystal ultrathin films at least up to 5ML. For as grown films, we observe only in-plane magnetization. After annealing the film, the Co film develops a perpendicular magnetic anisotropy, leading to a spin reorientation transition at 2.7 ML Co thickness. STM measurements were performed at room temperature both before and after annealing the film. We found very different surface morphology and alloy formation after the film annealing, and attribute the perpendicular magnetic anisotropy to the formation of the Co-Pt alloy layer at the Co/Pt(100) interface.