Spin gap and possible spin-dimer formation in Ce(Os1-xFex)2Al10 (X=0 to 1)

DOI

Our neutron study using MARI/MERLIN on Ce(Ru1-xFex) 2Al10 reveals very interesting magnetic excitations and a manuscript is ready to submit to PRB. In x=0 (TN=27 K) a Q-independent spin gap of 8 meV has been observed. x=0.3 and 0.5 (TN~27 K) samples reveal two spin gap type excitations near 8 meV and 12 meV. More interestingly, x=0.8 sample, which remains paramagnetic down to 50 mK reveals a clear spin gap of 10-12 meV, with strong Q-dependent intensity that follows spin-dimer structure factor. The observation of a spin gap in nonmagnetic sample opens a question what is its origin, spin-dimer or a gap opening on a small part of the Fermi surface. Our bulk study on Ce(Os1-xFex)2Al10 also reveals very similar behaviour to that of the (RuFe) system, but nonmagnetic ground state at x=0.6. We therefore propose to investigate the spin gap in Ce(Os1-xFex)2Al10 (x=0.3, 0.6 and 0.8).

Identifier
DOI https://doi.org/10.5286/ISIS.E.24088638
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/24088638
Provenance
Creator Dr Aidy Hillier; Dr Devashi Adroja; Dr Yuji Muro; Professor Toshiro Takabatake
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 2012-03-18T14:38:54Z
Temporal Coverage End 2012-11-19T13:44:04Z