Abstract
Monoclinic Li3Co2SbO6 has been proposed as a Kitaev spin liquid candidate and investigated intensively, whereas the properties of its polymorph, the orthorhombic phase, are less known. Here we report the magnetic properties of orthorhombic Li3Co2SbO6 as revealed by dc and ac magnetic susceptibility, muon spin relaxation (μSR), and neutron diffraction measurements. Successive magnetic transitions at 115, 89, and 71 K were observed in the low-field dc susceptibility measurements. The transitions below TN (115 K) are suppressed at higher applied fields. However, zero-field ac susceptibility measurements reveal distinct frequency-independent transitions at about 114, 107, 97, 79, and 71 K. A long-range magnetic ordered state was confirmed by specific heat, μSR, and neutron diffraction measurements, all indicating a single transition at about 115 K. The discrepancy between different measurements is attributed to possible stacking faults and/or local disorders of the ferromagnetic zigzag chains, resulting in ferromagnetic boundaries within the overall antiferromagnetic matrix.
| Original language | English |
|---|---|
| Pages (from-to) | 10880-10887 |
| Number of pages | 8 |
| Journal | Inorganic Chemistry |
| Volume | 61 |
| Issue number | 28 |
| DOIs | |
| State | Published - Jul 18 2022 |
Funding
H.G. acknowledges the support from the NSF of China, Grant No. 12004270, and the Guangdong Basic and Applied Basic Research Foundation (2019A1515110517). This research is also partly supported by the NSF of China, Grant No. U1932155. A portion of this work was supported by the Laboratory Directed Research and Development (LDRD) program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC for the U.S. Department of Energy.