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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 inthe form of antiferromagnetic Cu$^{2+}$ kagome planes. Here we report a newsynthesis method by which high quality millimeter-sized single crystals ofZn-paratacamite have been produced. These crystals have been characterized bymetal analysis, x-ray diffraction, neutron diffraction, and thermodynamicmeasurements. The $x$ = 1 member of the series displays a magneticsusceptibility that is slightly anisotropic at high temperatures with $\chi_{c}\, > \, \chi_{ab}$. Neutron and synchrotron x-ray diffraction experimentsconfirm the quality of these $x$ = 1 single crystals and indicate no obviousstructural transition down to temperatures of T=2 K.

physical review. b, condensed matter and materials physics

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$_{2}$