Synthesis and Characterization of Single Crystal Samples of Spin-$1/2$ Kagome Lattice Antiferromagnets in the Zn-Paratacamite Family Zn$_{x}$Cu$_{4-x}$(OH)$_{6}$Cl$_{2}$

Details Synthesis and Characterization of Single Crystal Samples of Spin-$1/2$ Kagome Lattice Antiferromagnets in the Zn-Paratacamite Family Zn$_{x}$Cu$_{4-x}$(OH)$_{6}$Cl$_{2}$ Synthesis and Characterization of Single Crystal Samples of Spin-$1/2$ Kagome Lattice Antiferromagnets in the Zn-Paratacamite Family Zn$_{x}$Cu$_{4-x}$(OH)$_{6}$Cl$_{2}$

2011-02-10

arxiv.org/abs/1102.2179v1

Phys. Rev. B 83, 100402(R) (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures, accepted by PRB rapid communication

Scientific paper

10.1103/PhysRevB.83.100402

The Zn-paratacamite family, Zn$_{x}$Cu$_{4-x}$(OH)$_{6}$Cl$_{2}$ for $x \, \geq$ 0.33, is an ideal system for studying spin-1/2 frustrated magnetism in the form of antiferromagnetic Cu$^{2+}$ kagome planes. Here we report a new synthesis method by which high quality millimeter-sized single crystals of Zn-paratacamite have been produced. These crystals have been characterized by metal analysis, x-ray diffraction, neutron diffraction, and thermodynamic measurements. The $x$ = 1 member of the series displays a magnetic susceptibility that is slightly anisotropic at high temperatures with $\chi_{c} \, > \, \chi_{ab}$. Neutron and synchrotron x-ray diffraction experiments confirm the quality of these $x$ = 1 single crystals and indicate no obvious structural transition down to temperatures of T=2 K.

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