English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We report on inelastic neutron scattering (INS) measurements on the molecularspin ring CsFe$_8$, in which eight spin-5/2 Fe(III) ions are coupled bynearest-neighbor antiferromagnetic Heisenberg interaction. We have recorded INSdata on a non-deuterated powder sample up to high energies at thetime-of-flight spectrometers FOCUS at PSI and MARI at ISIS, which clearly showthe excitation of spin waves in the ring. Due to the small number of spinsites, the spin-wave dispersion relation is not continuous but quantized.Furthermore, the system exhibits a gap between the ground state and the firstexcited state. We have modeled our data using exact diagonalization of aHeisenberg-exchange Hamiltonian together with a small single-ion anisotropyterm. Due to the molecule's symmetry, only two parameters $J$ and $D$ areneeded to obtain excellent agreement with the data. The results can be welldescribed within the framework of the rotational-band model as well asantiferromagnetic spin-wave theories.

Quantized antiferromagnetic spin waves in the molecular Heisenberg ring CsFe$_8$