Abstract
Polycrystalline samples of R2O2CO3 (R = Pr, Nd, Gd, Tb, Dy, Ho, Er, and Yb) with a unique rare-earth bilayer of triangular lattice were synthesized and studied by DC and AC magnetic susceptibility. Data reveals various magnetic ground states including (i) a nonmagnetic ground state for the Pr sample; (ii) long-range magnetic ordering for the Nd, Gd, Tb, Dy, Ho, and Er samples. Besides the Gd sample, they also exhibit field-induced spin state transitions. More interestingly, a series of spin state transitions in the Nd and Dy samples could be attributed to the field-induced up-up-down spin state and the 2:1 canted spin state. Neutron powder diffraction measurements of the Er sample suggest a spiral spin structure below its TN; and (iii) a short-range ordering for the Yb sample. The disrupted interlayer interaction due to the shift of Yb3+ ions within the bilayer prevents long-range magnetic ordering down to 30 mK and makes it another Yb-related triangular lattice antiferromagnet that has the potential to realize a quantum spin liquid state.
Original language | English |
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Article number | 114413 |
Journal | Physical Review Materials |
Volume | 8 |
Issue number | 11 |
DOIs | |
State | Published - Nov 2024 |
Funding
Research at the University of Tennessee is supported by the Air Force Office of Scientific Research under Grant No. FA9550-23-1-0502. A portion of this work was performed at the National High Magnetic Field Laboratory, which is supported by National Science Foundation Cooperative Agreement No. DMR-1644779 and the State of Florida.