Help Privacy Policy Disclaimer
  Advanced SearchBrowse




Journal Article

Probing Magnetic Excitations in Co-II Single-Molecule Magnets by Inelastic Neutron Scattering


Bill,  Eckhard
Research Department DeBeer, Max Planck Institute for Chemical Energy Conversion, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available

Stavretis, S. E., Cheng, Y., Daemen, L. L., Brown, C. M., Moseley, D. H., Bill, E., et al. (2019). Probing Magnetic Excitations in Co-II Single-Molecule Magnets by Inelastic Neutron Scattering. SI, (8), 1119-1127. doi:10.1002/ejic.201801088.

Cite as: https://hdl.handle.net/21.11116/0000-0006-75F5-2
Co(acac)(2)(H2O)(2) (1, acac = acetylacetonate), a transition metal complex (S = 3/2), displays field-induced slow magnetic relaxation as a single-molecule magnet. For 1 and its isotopologues Co(acac)(2)(D2O)(2) (1-d(4)) and Co(acac-d(7))(2)(D2O)(2) (1-d(18)) in approximately D-4h symmetry, zero-field splitting of the ground electronic state leads to two Kramers doublets (KDs): lower energy M-S = +/- 1/2 (phi(1,2)) and higher energy M-S = +/- 3/2 (phi(3,4)) states. This work employs inelastic neutron scattering (INS), a unique method to probe magnetic transitions, to probe different magnetic excitations in 1-d(4) and 1-d(18). Direct-geometry, time-of-flight Disk-Chopper Spectrometer (DCS), with applied magnetic fields up to 10 T, has been used to study the intra-KD transition as a result of Zeeman splitting, M-S = -1/2 (phi(1)) -> M-S = +1/2 (phi(2)), in 1-d(18). This is a rare study of the M-S = -1/2 -> M-S = +1/2 excitation in transition metal complexes by INS. Indirect-geometry INS spectrometer VISION has been used to probe the inter-KD, ZFS transition, M-S = +/- 1/2 (phi(1,2)) -> M-S = +/- 3/2 (phi(3,4)) in both 1-d(4) and 1-d(18), by variable-temperature (VT) properties of this excitation. The INS spectra measured on VISION also give phonon features of the complexes that are well described by periodic DFT phonon calculations.