Abstract
The magnetic ground state and the crystalline electric field level scheme of the triangular lattice antiferromagnet are investigated. Below mK, develops signatures of magnetic order in specific heat measurements and low energy inelastic neutron scattering data. Trivalent ions in the local environment of this compound exhibit large splittings among the lowest three Kramers doublets defining for the free ion the sextet and a ground state doublet with dipole character, consistent with recent theoretical predictions by Eldeeb et al. [Phys. Rev. Materials4, 124001 (2020)10.1103/PhysRevMaterials.4.124001]. An unexplained, additional local mode appears, and potential origins of this anomalous mode are discussed.
| Original language | English |
|---|---|
| Article number | 094421 |
| Journal | Physical Review B |
| Volume | 104 |
| Issue number | 9 |
| DOIs | |
| State | Published - Sep 1 2021 |
Funding
S.D.W. and M.B. sincerely thank Leon Balents and Chunxiao Liu for helpful discussions. This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under award DE-SC0017752 (S.D.W. and M.B.). Research reported here also made use of shared facilities of the UCSB MRSEC (NSF DMR-1720256). A portion of this research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by Oak Ridge National Laboratory. The work at Georgia Tech (heat-capacity measurements) was supported by the NSF under NSF-DMR-1750186. M.S. and X.W. acknowledge support via the UC Santa Barbara NSF Quantum Foundry funded via the Q-AMASE-i program under award DMR-1906325. T.P. and L.H. acknowledge financial support from the German Research Foundation (Grant Nos. HO-4427/3 and HO-4427/6). M.S.E, T.P., L.H., and U.K.R. thank Ulrike Nitzsche for technical assistance. A portion of this research was performed at the NIST Center for Neutron research, and certain commercial equipment, instruments, or materials are identified in this document and does not imply recommendation or endorsement by the National Institute of Standards and Technology, nor does it imply that the products identified are necessarily the best available for the purpose.