Regensburg 2002 – wissenschaftliches Programm
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MA: Magnetismus
MA 10: Poster : Dünne Schichten(1-21),Spinabh.Transp.(22-39),Exch.Bias(40-51),Spindyn.(52-55),Mikromag.(56-66),Partikel(67-74),Abb.Verf.(75-77),Oberfl.+Spinelektr.+Elektr.Theo+Mikromag(75-87),PÜ+Aniso+Werkst/Leg.(88-103),Mol.Mag.+N-dim+Messm.+Postdead(104-111
MA 10.104: Poster
Dienstag, 12. März 2002, 15:00–19:00, Bereich A
Electronic structure and magnetism of the molecule–based magnet Mn[N(CN)2]2 — •S.G. Chiuzbăian1, M. Neumann1, E.Z. Kurmaev2, M.R. Pederson3, A.Y. Liu4, T. Buruah4, A. Moewes5, C.R. Kmety6, K.L. Stevenson7, and D. Ederer8 — 1Universität Osnabrück, Fachbereich Physik, Osnabrück, Germany — 2Institute of Metal Physics, Russian Academy of Sciences, Yekaterinburg, Russia — 3Center for Computational Materials Science, Naval Research Laboratory, Washington, USA — 4Dept. of Physics, Georgetown University, Washington, USA — 5Dept. of Physics and Engineering Physics, University of Saskatchewan, Canada — 6Materials Science Division, Argonne National Laboratory, Argonne, USA — 7Dept. of Chemistry, Indiana University, Indiana, USA — 8Department of Physics, Tulane University, New Orleans, USA
We have carried out a joint experimental and theoretical investigation on the electronic and magnetic structure for the Mn[N(CN)2]2 dicyanamide material. X–ray emission and photoelectron spectroscopies (XES/XPS) were employed in order to probe contributions of each element to the valence band. The magnetic interaction pathway between Mn ions was resolved. The intensity ratio I(L2)/I(L3) of the Mn L-XES threshold is discussed in terms of Coster-Kronig transitions and indicate an oxidation state for manganese close to Mn2+. Calculations performed in the frame of density functional theory (DFT) are in good agreement with the experimental results and revealed an antiferromagnetic structure with a local easy axis.
[1] C.R. Kmety et al., Phys. Rev. B 60 60–63 (2001)