Antiferromagnetic long-range order in Cu_{1-x}Zn_xGeO_3 with extremely low Zn concentration

K. Manabe; H. Ishimoto; N. Koide; Y. Sasago; K. Uchinokura

doi:10.1103/PhysRevB.58.R575

Antiferromagnetic long-range order in Cu_{1-x}Zn_xGeO_3 with extremely low Zn concentration

Strongly Correlated Electrons 2009-10-31 v1 Materials Science

Authors: K. Manabe , H. Ishimoto , N. Koide , Y. Sasago , K. Uchinokura

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Abstract

We have measured the magnetic susceptibilities of single crystals of Cu_{1-x}Zn_xGeO_3 with extremely low Zn concentration (x) lower than x=5x10^{-3} at very low temperatures to investigate the spin-Peierls and antiferromagnetic transitions. The results show that the undoped CuGeO_3 has no antiferromagnetic phase down to 12 mK and there exists an antiferromagnetic long-range order with the easy axis along the $c$ axis for x down to 1.12(2)x10^{-3}. The minimum observed Neel temperature was 0.0285 K for x=1.12(2)x10^{-3} sample. From the concentration dependence of the Neel temperature it is concluded that there is no critical concentration for the occurrence of the antiferromagnetic long-range order.

Keywords

antiferromagnetic long-range order spin-Peierls transition CuGeO3 Zn doping Néel temperature magnetic susceptibility

Cite

@article{arxiv.cond-mat/9805072,
  title  = {Antiferromagnetic long-range order in Cu_{1-x}Zn_xGeO_3 with extremely low Zn concentration},
  author = {K. Manabe and H. Ishimoto and N. Koide and Y. Sasago and K. Uchinokura},
  journal= {arXiv preprint arXiv:cond-mat/9805072},
  year   = {2009}
}

Comments

4 pages, 5 Postscript figures, uses revtex. To be published in Phys. Rev. B, Rapid Communications

Antiferromagnetic long-range order in Cu_{1-x}Zn_xGeO_3 with extremely low Zn concentration

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