Three-Axis Anisotropic Exchange Coupling in the Single-Molecule Magnets NEt4[MnIII2(5-Brsalen)2(MeOH)2MIII(CN)6] (M=Ru, Os)

Jan Dreiser, Kasper Steen Pedersen, Alexander Schnegg, Karsten Holldack, Joscha Nehrkorn, Marc Sigrist, Philip Tregenna-Piggott, Hannu Mutka, Høgni Weihe, Vladimir S. Mironov, Jesper Bendix, Oliver Waldmann

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

We have investigated the single-molecule magnets [MnIII2(5-Brsalen)2(MeOH)2MIII(CN)6]NEt4 (M=Os (1) and Ru (2); 5-Brsalen=N,N-ethylenebis(5-bromosalicylidene)iminate) by frequency-domain Fourier-transform terahertz electron paramagnetic resonance (THz-EPR), inelastic neutron scattering, and superconducting quantum interference device (SQUID) magnetometry. The combination of all three techniques allows for the unambiguous experimental determination of the three-axis anisotropic magnetic exchange coupling between MnIII and RuIII or OsIII ions, respectively. Analysis by means of a spin-Hamiltonian parameterization yields excellent agreement with all experimental data. Furthermore, analytical calculations show that the observed exchange anisotropy is due to the bent geometry encountered in both 1 and 2, whereas a linear geometry would lead to an Ising-type exchange coupling.
Original languageEnglish
JournalChemistry-a European Journal
Volume19
Issue number11
Pages (from-to)3693-3701
ISSN0947-6539
DOIs
Publication statusPublished - 2013
Externally publishedYes

Fingerprint

Dive into the research topics of 'Three-Axis Anisotropic Exchange Coupling in the Single-Molecule Magnets NEt<sub>4</sub>[Mn<sup>III</sup><sub>2</sub>(5-Brsalen)<sub>2</sub>(MeOH)<sub>2</sub>M<sup>III</sup>(CN)<sub>6</sub>] (M=Ru, Os)'. Together they form a unique fingerprint.

Cite this