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MA: Fachverband Magnetismus

MA 19: Surface and Interface Magnetism I (jointly with O)

MA 19.1: Vortrag

Dienstag, 12. März 2013, 10:30–10:45, H33

Magnetism of Fe on Pt(111) Revisited by Inelastic Scanning Tunneling Spectroscopy — Tobias Schlenk, Alexander Ako Khajetoorians, •Jens Wiebe, and Roland Wiesendanger — Institute of Applied Physics, Hamburg University, Germany

We revisited the magnetism of single Fe atoms [1] and Fe-H_n complexes adsorbed on the surface of Pt(111) by means of magnetic field dependent inelastic scanning tunneling spectroscopy [2,3]. We found that the magnetic easy axis is either perpendicular to or within the surface plane, depending on an fcc or hcp adsorption site. Adsorption of H atoms changes the strength of the magnetic anisotropy and leads to Kondo screening for one of the two Fe-H₂ complexes. For all investigated cases, the magnetic anisotropy energy is almost an order of magnitude lower than recently reported [1].

[1] T. Balashov et al., Phys. Rev. Lett. 102, 257203 (2009).

[2] A. A. Khajetoorians, S. Lounis, B. Chilian, A. T. Costa, L. Zhou, D. L. Mills, J. Wiebe, and R. Wiesendanger, Phys. Rev. Lett. 106, 037205 (2011).

[3] B. Chilian, A. A. Khajetoorians, S. Lounis, A. T. Costa, D. L. Mills, J. Wiebe, and R. Wiesendanger, Phys. Rev. B 84, 212401 (2011).