Ultrahigh Magnetic Field Phases in Frustrated Triangular-lattice Magnet CuCrO2
Abstract
The magnetic phases of a triangular-lattice antiferromagnet, CuCrO2, were investigated in magnetic fields along to the c axis, H // [001], up to 120 T. Faraday rotation and magneto-absorption 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 Y-shaped and the V-shaped phases are proposed to be viable candidates. These ordered phases are 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.
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