Abstract
The magnetic phases of a triangular-lattice antiferromagnet were investigated in magnetic fields along the axis, , up to 120 T. Faraday rotation and magnetoabsorption spectroscopy were used to unveil the rich physics of magnetic phases. An up-up-down (UUD) magnetic structure phase was observed around 90–105 T at temperatures around 10 K. Additional distinct anomalies adjacent to the UUD phase were uncovered and the -shaped and the -shaped phases are proposed to be viable candidates. These ordered phases emerged as a result of the interplay of geometrical spin frustration, single-ion anisotropy, and thermal fluctuations in an environment of extremely high magnetic fields.
- Received 4 September 2017
DOI:https://doi.org/10.1103/PhysRevB.96.180401
©2017 American Physical Society