Abstract
We investigate the crystal structure, magnetic properties, and crystalline electric field of tetragonal, I41/amd, NaCeO2. In this compound, Ce3+ ions form a tetragonally elongated diamond lattice coupled by antiferromagnetic interactions (ΘCW=-7.69 K) that magnetically order below TN=3.18 K. The Ce3+J=5/2 crystalline electric field-split multiplet is studied via inelastic neutron scattering to parametrize a Jeff=1/2 ground state doublet composed of states possessing mixed |mz) character. Neutron powder diffraction data reveal the onset of A-type antiferromagnetism with μ=0.57(2)μB moments aligned along the c axis. The magnetic structure is consistent with the expectations of a frustrated Heisenberg J1-J2 model on the elongated diamond lattice with effective exchange values J1>4J2 and J1>0.
| Original language | English |
|---|---|
| Article number | 024430 |
| Journal | Physical Review B |
| Volume | 103 |
| Issue number | 2 |
| DOIs | |
| State | Published - Jan 19 2021 |
Funding
S.D.W. and M.M.B. sincerely thank L. Balents and C. 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 No. DE-SC0017752 (S.D.W. and M.B.). Research reported here also made use of shared facilities of the UCSB MRSEC (NSF Grant No. 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.