AVS 47th International Symposium
    Magnetic Interfaces and Nanostructures Tuesday Sessions
       Session MI+NS+NANO 6-TuA

Paper MI+NS+NANO 6-TuA8
Real-Space Imaging of Two-Dimensional Antiferromagnetism on the Atomic Scale

Tuesday, October 3, 2000, 4:20 pm, Room 206

Session: Magnetic Imaging II
Presenter: M. Bode, University of Hamburg, Germany
Authors: M. Bode, University of Hamburg, Germany
S. Heinze, Forschungszentrum Jülich, Germany
A. Kubetzka, University of Hamburg, Germany
O. Pietzsch, University of Hamburg, Germany
X. Nie, Forschungszentrum Jülich, Germany
S. Blügel, Forschungszentrum Jülich, Germany
R. Wiesendanger, University of Hamburg, Germany
Correspondent: Click to Email
The ultimate limit of two-dimensional antiferromagnetism (2D-AFM) is a magnetic monolayer of chemically equivalent atoms, where adjacent atoms at nearest-neighbor sites have magnetic moments with opposite directions, deposited on a non-magnetic substrate.@footnote 1@ Since the total magnetization of this film is zero spatially averaging techniques like spin-polarized photoelectron spectroscopy cannot be used for an experimental verification of (2D-AFM). We have resolved the two-dimensional antiferromagnetic structure within a pseudomorphic monolayer film of chemically identical manganese atoms on tungsten (110) by spin-polarized scanning tunneling microscopy (SP-STM) at 16 Kelvin.@footnote 2@ While images of the chemical surface unit-cell without any magnetic contribution were obtained using a non-magnetic W-tip, spin-polarized electrons from magnetically coated tips probe the change in translational symmetry due to the magnetic c(2x2)-superstructure of Mn/W(110). Based on fundamental theoretical arguments it will be shown that SP-STM is a powerful technique for the investigation of complicated surface magnetic configurations. @FootnoteText@ @footnote 1@ S. Blügel, M. Weinert, and P.H. Dederichs, Phys. Rev. Lett. 60, 1077 (1988). @footnote 2@ O. Pietzsch et al., Rev. Sci. Instr. 71, 424 (2000).