Frequency-domain fourier-transform terahertz spectroscopy of the single-molecule magnet (NEt4)[Mn2(5-Brsalen) 2(MeOH)2Cr(CN)6]

Jan Dreiser, Alexander Schnegg, Karsten Holldack, Kasper S. Pedersen, Magnus Schau-Magnussen, Joscha Nehrkorn, Philip Tregenna-Piggott, Hannu Mutka, Høgni Weihe, Jesper Bendix, Oliver Waldmann

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Abstract

We have investigated the novel single-molecule magnet (NEt 4)[Mn2(5-Brsalen)2(MeOH)2Cr(CN) 6] (1; 5-Brsalen=N,N′-ethylenebis(5-bromosalicylidene)iminato anion) using spectroscopic as well as magnetization and susceptibility measurements. Frequency-domain Fourier-transform terahertz electron paramagnetic resonance (FDFT THz-EPR) based on the generation of THz radiation from a synchrotron in combination with inelastic neutron scattering (INS) allows for the discrimination between intermultiplet and intramultiplet transitions. Together with ac/dc magnetic susceptibility measurements the obtained set of data provides a complete characterization of the lowest energetic magnetic excitations. We find that the new compound 1 exhibits much weaker intermolecular interactions than found in the closely related compound: K[Mn 2(5-Brsalen)2(H2O)2Cr(CN) 6] (2). Furthermore, two phonon lines in the vicinity of the magnetic excitations are detected.

Original languageEnglish
Pages (from-to)7492-7498
Number of pages7
JournalChemistry - A European Journal
Volume17
Issue number27
DOIs
Publication statusPublished - 27 Jun 2011
Externally publishedYes

Keywords

  • chromium
  • EPR spectroscopy
  • inelastic neutron scattering
  • magnetic properties
  • manganese

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