Magnetic Excitation Spectrum of the Fe19 High Spin Molecular Nanomagnet

DOI

Our recent WISH study of the low temperature longe range ordered magnetic structure of the Fe19 single molecule magnetic system with S=35/2 produced an easy spin axis that is at variance with the conclusions of a previous EPR study and a mode of ordering that differs from intermolecular coupling via purely dipolar interaction. The apparent difference in easy axis is believed to be the result of the EPR measurement mixing in a low lying S=33/2 excited state with a different easy axis from that of the ground state. The proposed inelastic neutron studies using LET will determine the excitation spectrum of the S=35/2 ground state and the S=33/2 excited state and follow the splitting of the spectrum as the system undergoes long range ordering below 1.2 K. These new measurements should help resolve the discrepancy and clarify the basis for interpreting the magnetic properties of this system.

Identifier
DOI https://doi.org/10.5286/ISIS.E.84779289
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/84779289
Provenance
Creator Professor Stephen Blundell; Professor Annie Powell; Dr Francis Pratt; Dr Tatiana Guidi; Dr Pascal Manuel; Dr Rob Bewley
Publisher ISIS Neutron and Muon Source
Publication Year 2020
Rights CC-BY Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Contact isisdata(at)stfc.ac.uk
Representation
Resource Type Dataset
Discipline Chemistry; Natural Sciences; Physics
Temporal Coverage Begin 2017-03-02T10:00:00Z
Temporal Coverage End 2017-03-05T10:00:00Z