Berlin 2012 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 32: Joint Session "Surface Magnetism I" (jointly with O)
MA 32.6: Vortrag
Mittwoch, 28. März 2012, 17:30–17:45, BH 243
Competing interactions and chiral magnetism in Mn1/X(111), X = Pd, Pt, Ag and Au — •Manuel dos Santos Dias1,3, Julie Staunton1, Andras Deak2, and Laszlo Szunyogh2 — 1Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom — 2Department of Theoretical Physics, Budapest University of Technology and Economics, H-1111 Budapest, Hungary — 3Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich, D-52425 Jülich, Germany
The magnetism of Mn monolayers on X(111), with X = Pd, Pt, Ag and Au, is analysed, using our Relativistic Disordered Local Moment Theory, based on DFT and the KKR Green function method [1]. The substrates control the antiferromagnetism, favouring either a collinear row–by–row state or a triangular Néel state. The latter is shown to possess a well–defined chirality pattern, originating from the Dzyaloshinksy–Moriya interactions. The anisotropic interactions are governed not only by the atomic number of the substrate but also by the extent of its hybridisation with the magnetic monolayer. Comparison with the experimental results for Mn1/Ag(111) [2] is also given.
We acknowledge funding from Portugal (SFRH/BD/35738/2007) and Hungary (contract OTKA K77771 and project TAMOP-4.2.1/B-09/1/KMR-2010-0002).
[1] M. dos Santos Dias, J. B. Staunton, A. Deak and L. Szunyogh, Phys. Rev. B 83, 054435 (2011)
[2] C. L. Gao, W. Wulfhekel and J. Kirschner, Phys. Rev. Lett. 101, 267205 (2008)