Abstract
We report anisotropic magnetization plateaus in the skew-chain antiferromagnet with and a large factor. When the field is applied along the easy axis, a 1/2-like magnetization plateau is observed within , followed by a 3/4 plateau at 15.7 T. For the hard and axes, however, there is only a sign of 1/2-like magnetization plateau. These observations are quite different from the isostructural [Z. W. Ouyang et al., Phys. Rev. B 97, 144406 (2018)]. Theoretically, the first-principles calculations reveal the large interchain coupling, which leads to classical antiferromagnetic ordering and spin-flop-like transition. With this large interchain coupling, the exact diagonalization analysis yields 1/2 and 3/4 plateaus, showing the quantum origin of magnetization plateaus. Thus, is an interchain-coupled system showing both classical and quantum behaviors.
3 More- Received 5 November 2018
- Revised 15 March 2019
DOI:https://doi.org/10.1103/PhysRevB.99.134434
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