Search for magnon-phonon coupling effect in metallic triangular antiferromagnet CrB2

DOI

Spin dynamics of non-collinear magnetic structures can exhibit the rare phenomena which go beyond the linear spin wave theory. Our previous studies on non-collinear antiferromagnetic insulators (Y, Lu)MnO3 at ISIS showed that magnon-magnon/phonon interactions indeed have a sizable effect on the spin dynamics. To extend this concept to metallic systems, we have recently carried out an inelastic neutron scattering experiment at MAPS on CrB2, a metallic triangular antiferromagnet with non-collinear magnetic structure. Along with successful measurements of magnons over a large momentum-energy space, we observed that some phonon modes near the magnon modes have unusual behavior, which is also seen in (Y, Lu)MnO3. To confirm that this anomaly comes from magnon-phonon coupling, we propose to investigate the phonon spectra of CrB2 at 150 K, the temperature above TN =88 K where magnons disappear.

Identifier
DOI https://doi.org/10.5286/ISIS.E.RB1920370-2
Metadata Access https://icatisis.esc.rl.ac.uk/oaipmh/request?verb=GetRecord&metadataPrefix=oai_datacite&identifier=oai:icatisis.esc.rl.ac.uk:inv/108676514
Provenance
Creator Mr Taehun Kim; Professor Michel Kenzelmann; Mr KISOO PARK; Professor Jun Akimitsu; Professor Je-Geun Park; Dr Toby Perring; Dr Yusuke Kosaka; Mr Pyeongjae Park; Mr heejun yang; Mr chaebin kim
Publisher ISIS Neutron and Muon Source
Publication Year 2022
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 2019-11-27T16:17:00Z
Temporal Coverage End 2019-12-01T08:30:00Z