Transverse field evolution of magnetic excitation spectrum in Nb1-yFe2+y

DOI

Our previous neutron scattering on C14 Laves phase compounds Nb1-yFe2+y revealed that a spin-density-wave (SDW) is masking an underlying ferromagnetic (FM) quantum critical point (QCP) of the system. With previous inelastic neutron scattering on an Fe-rich sample at zero magnetic field we observed enhanced soft magnetic excitations with an exotic dispersion, which reflects the presence of emerging SDW order. We propose to now carry out inelastic neutron scattering with high E resolution in a wide Q range on the same sample to follow the evolution of the magnetic spectra in finite transverse magnetic field, which drives the easy c-axis system away from SDW order and towards an unmasked FM quantum critical point (QCP). It will be important to see, whether at higher fields the unconventional dispersion gives way to one expected from spin-fluctuation theory. We ask for 7 days of beamtime.

Identifier
DOI https://doi.org/10.5286/ISIS.E.96307144
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/96307144
Provenance
Creator Mr GIRI MANI; Mr Marijn Lucas; Professor Malte Grosche; Dr Rob Bewley; Professor Christian Pfleiderer; Dr Philipp Niklowitz; Mr Thomas Poulis
Publisher ISIS Neutron and Muon Source
Publication Year 2021
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 Natural Sciences; Physics
Temporal Coverage Begin 2018-06-21T07:30:00Z
Temporal Coverage End 2018-06-27T07:30:00Z