Investigation of the field induced magnetic ordering in the spin gap compound YbAl3C3

DOI

Our neutron study on YbAl3C3 reveals the presence of two well defined magnetic excitations at 1.5 and 3 meV at 4 K due to spin-dimer formation. Interestingly the specific heat in zero-field exhibits a peak at 5 K, while in 9 T field the peak moves to T->0 K. This 9 T field correspond to the same field where the magnetization at 1.1 K exhibits a jump and reveals plateaus, which indicates that at HC=9 T the magnons undergo Bose-Einstein condensation (BEC). We have submitted a proposal for LET to obtain direct evidence of the BEC in YbAl3C3 at Hc=9T. Another significant feature of BEC systems is that they should exhibit long range magnetic ordering at field higher than HC. We therefore propose to carry out neutron diffraction on WISH to examine YbAl3C3 in an applied field of 13.5T, at 50mK. This experiment is crucial and will help to confirm whether YbAl3C3 is really in a magnon BEC state.

Identifier
DOI https://doi.org/10.5286/ISIS.E.24088675
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24088675
Provenance
Creator Professor Keith McEwen; Dr Aidy Hillier; Dr Devashi Adroja; Professor Je-Geun Park; Professor Masashi Kosaka
Publisher ISIS Neutron and Muon Source
Publication Year 2015
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 Photon- and Neutron Geosciences
Temporal Coverage Begin 2012-08-02T14:30:51Z
Temporal Coverage End 2012-08-04T07:26:05Z