Title: Conservation of uniaxial symmetry in Fe/Ag multilayers grown on stepped Ag(001)
Authors: Degroote, Bart ×
Major, M
Meersschaut, Johannes
Dekoster, J
Langouche, Guido #
Issue Date: Jun-2001
Publisher: Elsevier science bv
Series Title: Surface science vol:482 pages:1090-1094
Abstract: We obtained a stepped Ag(0 0 1) surface by growing a 100 nm thick Ag film on a polished MgO(0 0 1) crystal with a miscut of 1.8 in the [1 1 0] direction. With scanning tunneling microscopy we observe terraces of (7 +/- 3) nm wide separated by mono-atomic steps that are straight over at least 200 nm in the [1 1 0] direction. The interface structure of Fe/Ag multilayers grown at room temperature (RT) on vicinal Ag(0 0 1) is investigated for 15 monolayers (ML) of Fe and a Ag thickness ranging from 2 to 10 ML. During Fe growth the step structure disappears at the surface of the film. When Ag is deposited on top, steps already reappear at 2 ML. For increased Ag thickness, the steps straighten out and the roughness on terraces decreases. At 8 ML of Ag the step length and surface roughness is comparable to the uncovered Ag surface. However, on larger terraces, Ag islands are observed. In addition we compare the direction of magnetization with respect to the surface normal of an [Fe(15 ML)/Ag(4 ML)], multilayer grown on vicinal and flat Ag(0 0 1). For the vicinal substrate, at RT, we observe in-plane magnetization whereas for the flat substrate the magnetization is 29 out-of-plane. The results are discussed with respect to step anisotropy and step-related symmetry. (C) 2001 Elsevier Science B.V. All rights reserved.
ISSN: 0039-6028
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
× corresponding author
# (joint) last author

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