Critical phenomena at the antiferromagnetic phase transition of azurite

Abstract

We report on high-resolution acoustic, specific heat and thermal expansion measurements in the vicinity of the antiferromagnetic phase transition at T N = 1.88 K on a high-quality single crystal of the natural mineral azurite. A detailed investigation of the critical contribution to the various quantities at T N is presented. The set of critical exponents and amplitude ratios of the singular contributions above and below the transition indicate that the system can be reasonably well described by a three-dimensional Heisenberg antiferromagnet.

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Correspondence to P. T. Cong.

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Cong, P.T., Wolf, B., Manna, R.S. et al. Critical phenomena at the antiferromagnetic phase transition of azurite. Journal of the Korean Physical Society 62, 2193–2196 (2013). https://doi.org/10.3938/jkps.62.2193

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Keywords

  • low-dimensional spin systems
  • critical behavior