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High-Field and Multi-Frequency ESR in the Quasi Two-Dimensional Triangular-Lattice Antiferromagnet CuCrO2

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Abstract

We have performed high-field and multi-frequency electron spin resonance (ESR) and magnetization measurements in magnetic fields up to about 53 T on single crystals of a delafossite triangular-lattice antiferromagnet CuCrO2, which has been proposed to show an out-of-plane 120° spiral spin structure below about 24 K. We calculated ESR resonance modes and magnetization curves assuming an Ising-like Heisenberg Hamiltonian with a spiral spin structure by a mean-field theory. The experimental results can be well reproduced using the following parameters, the intralayer exchange constant J/k B=26.9 K, the easy-axis anisotropy D/k B=−0.47 K, and the in-plane g-factor g ab =2.0.

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Authors and Affiliations

  1. KYOKUGEN, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka, 560-8531, Japan

    H. Yamaguchi, S. Otomo, S. Kimura & M. Hagiwara

  2. Division of Materials Physics, Graduate School Engineering Science, Osaka University, Machikaneyama 1-3, Toyonaka, Osaka, 560-8531, Japan

    K. Kimura & T. Kimura

  3. Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, 277-8581, Japan

    K. Kindo

Authors
  1. H. Yamaguchi
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  2. S. Otomo
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  3. S. Kimura
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  4. M. Hagiwara
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  5. K. Kimura
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  6. T. Kimura
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  7. K. Kindo
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Correspondence to H. Yamaguchi.

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Yamaguchi, H., Otomo, S., Kimura, S. et al. High-Field and Multi-Frequency ESR in the Quasi Two-Dimensional Triangular-Lattice Antiferromagnet CuCrO2 . J Low Temp Phys 159, 130–133 (2010). https://doi.org/10.1007/s10909-009-0083-9

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  • DOI: https://doi.org/10.1007/s10909-009-0083-9

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