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High-Field Torque Magnetometry on the Kagome Antiferromagnet Karpenkoite

Hibiki Kunisawa, Ryuya Watanabe, Jun-ichi Yamaura, Yoshimitsu Kohama, Toshihiro Nomura

Abstract

We report torque magnetometry results on single crystals of karpenkoite Co3(V2O7)(OH)2 2H2O, a model candidate for the kagome antiferromagnet. No field-induced phase transition is detected up to 45 T for B||c and B||a. Instead, the torque reveals a continuous spin reorientation toward saturation, most likely governed by a dominant Dzyaloshinskii-Moriya interaction.

High-Field Torque Magnetometry on the Kagome Antiferromagnet Karpenkoite

Abstract

We report torque magnetometry results on single crystals of karpenkoite Co3(V2O7)(OH)2 2H2O, a model candidate for the kagome antiferromagnet. No field-induced phase transition is detected up to 45 T for B||c and B||a. Instead, the torque reveals a continuous spin reorientation toward saturation, most likely governed by a dominant Dzyaloshinskii-Moriya interaction.
Paper Structure (1 section, 1 figure)

This paper contains 1 section, 1 figure.

Figures (1)

  • Figure 1: (a) Torque signal as a function of magnetic field nearly along the $c$ and $a$ axes. The black and red curves show the results at 1.5 K and 18 K, respectively. The curves for $B \parallel a$ are shifted for clarity. The inset shows the definition of $\theta$. (b) Torque signal normalized by the magnetic field ($\tau / B$) at 1.5 K.