Magnetic transitions in botallackite-structure Cu2(OH)3Br and Cu2(OH)3I

X. G. Zheng, T. Yamashita, M. Hagihala, M. Fujihala, T. Kawae

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)

Abstract

The deformed pyrochlore lattice compound clinoatacamite, Cu2(OH)3Cl, shows intriguing frustrated magnetism and 1/4 substitution of Cu with nonmagnetic Zn leads to the two-dimensional kagome lattice ZnCu3Cl2(OH)6 that exhibits spin liquid behaviour. These findings renewed interest in botallackite Cu2(OH)3Cl, which is a polymorphous structure of clinoatacamite Cu2(OH)3Cl possessing a two-dimensional triangular lattice. The present work investigates the effect of halogen ions on the magnetic transitions in the botallackite structure. Similar to the antiferromagnetic Cu2(OH)3Cl (TN=7.2 K), Cu2(OH)3Br and Cu2(OH)3I both showed antiferromagnetic transitions at TN=10 and 14 K, respectively. Long-range order also exists in Cu2(OH)3Br as exemplified by the μSR study. The experimental results suggest that the magnetic coupling on the triangular lattice is dominated by the super-exchange interaction through the halogen ions. Further detailed comparison studies on these botallackite-structure compounds are expected to clarify the spin configuration on this triangular lattice.

Original languageEnglish
Pages (from-to)680-682
Number of pages3
JournalPhysica B: Condensed Matter
Volume404
Issue number5-7
DOIs
Publication statusPublished - Apr 15 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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