Spin resolved photoelectron spectroscopy of [(Mn6CrIII)-Cr-III](3+) single-molecule magnets and of manganese compounds as reference layers

Helmstedt A, Müller N, Gryzia A, Dohmeier N, Brechling A, Sacher M, Heinzmann U, Höke V, Krickemeyer E, Glaser T, Bouvron S, et al. (2011)
Journal of Physics Condensed Matter 23(26).

Journal Article | Published | English

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Abstract
Properties of the manganese-based single-molecule magnet [(Mn6CrIII)-Cr-III](3+) are studied. It contains six Mn-III ions arranged in two bowl-shaped trinuclear triplesalen building blocks linked by a hexacyanochromate and exhibits a large spin ground state of S-t = 21/2. The dominant structures in the electron emission spectra of [(Mn6CrIII)-Cr-III](3+) resonantly excited at the L-3-edge are the L3M2,3M2,3, L3M2,3V and L3VV Auger emission groups following the decay of the primary p(3/2) core hole state. Significant differences of the Auger spectra from intact and degraded [(Mn6CrIII)-Cr-III](3+) show up. First measurements of the electron spin polarization in the L3M2,3V and L3VV Auger emission peaks from the manganese constituents in [(Mn6CrIII)-Cr-III](3+) resonantly excited at the L-3-edge near 640 eV by circularly polarized synchrotron radiation are reported. In addition spin resolved Auger electron spectra of the reference substances MnO, Mn2O3 and Mn-II(acetate)(2)center dot 4H(2)O are given. The applicability of spin resolved electron spectroscopy for characterizing magnetic states of constituent atoms compared to magnetic circular dichroism (MCD) is verified: the spin polarization obtained from Mn-II(acetate)(2)center dot 4H(2)O at room temperature in the paramagnetic state compares to the MCD asymmetry revealed for a star-shaped molecule with a (Mn4O6)-O-II core at 5 K in an external magnetic field of 5 T.
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Helmstedt A, Müller N, Gryzia A, et al. Spin resolved photoelectron spectroscopy of [(Mn6CrIII)-Cr-III](3+) single-molecule magnets and of manganese compounds as reference layers. Journal of Physics Condensed Matter. 2011;23(26).
Helmstedt, A., Müller, N., Gryzia, A., Dohmeier, N., Brechling, A., Sacher, M., Heinzmann, U., et al. (2011). Spin resolved photoelectron spectroscopy of [(Mn6CrIII)-Cr-III](3+) single-molecule magnets and of manganese compounds as reference layers. Journal of Physics Condensed Matter, 23(26).
Helmstedt, A., Müller, N., Gryzia, A., Dohmeier, N., Brechling, A., Sacher, M., Heinzmann, U., Höke, V., Krickemeyer, E., Glaser, T., et al. (2011). Spin resolved photoelectron spectroscopy of [(Mn6CrIII)-Cr-III](3+) single-molecule magnets and of manganese compounds as reference layers. Journal of Physics Condensed Matter 23.
Helmstedt, A., et al., 2011. Spin resolved photoelectron spectroscopy of [(Mn6CrIII)-Cr-III](3+) single-molecule magnets and of manganese compounds as reference layers. Journal of Physics Condensed Matter, 23(26).
A. Helmstedt, et al., “Spin resolved photoelectron spectroscopy of [(Mn6CrIII)-Cr-III](3+) single-molecule magnets and of manganese compounds as reference layers”, Journal of Physics Condensed Matter, vol. 23, 2011.
Helmstedt, A., Müller, N., Gryzia, A., Dohmeier, N., Brechling, A., Sacher, M., Heinzmann, U., Höke, V., Krickemeyer, E., Glaser, T., Bouvron, S., Fonin, M., Neumann, M.: Spin resolved photoelectron spectroscopy of [(Mn6CrIII)-Cr-III](3+) single-molecule magnets and of manganese compounds as reference layers. Journal of Physics Condensed Matter. 23, (2011).
Helmstedt, Andreas, Müller, Norbert, Gryzia, Aaron, Dohmeier, Niklas, Brechling, Armin, Sacher, Marc, Heinzmann, Ulrich, Höke, Veronika, Krickemeyer, Erich, Glaser, Thorsten, Bouvron, Samuel, Fonin, Mikhail, and Neumann, Manfred. “Spin resolved photoelectron spectroscopy of [(Mn6CrIII)-Cr-III](3+) single-molecule magnets and of manganese compounds as reference layers”. Journal of Physics Condensed Matter 23.26 (2011).
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Preparation of monolayers of [MnIII6CrIII]3+ single-molecule magnets on HOPG, mica and silicon surfaces and characterization by means of non-contact AFM.
Gryzia A, Predatsch H, Brechling A, Hoeke V, Krickemeyer E, Derks C, Neumann M, Glaser T, Heinzmann U., Nanoscale Res Lett 6(), 2011
PMID: 21824398

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