Structural and Magnetic Properties of Single Crystals of the   Geometrically Frustrated Zirconium Pyrochlore, Pr2Zr2O7
  We report the growth of large high quality crystals of the frustrated magnet, Pr2Zr2O7 by the floating zone technique. Several crystals have been produced starting with varying levels of excess of Pr6O11 to compensate for the loss of Pr2O3 during the growth process. X-ray diffraction analysis of the crystals shows that the Pr composition in our crystals, as determined by the Pr site occupancy in the pyrochlore structure, is always slightly less than 1. Fits to the magnetic sus-ceptibility data below 10 K using a Curie-Weiss law reveal an antiferromagnetic coupling between the Pr moments, with an estimated Weiss temperature of {\Theta}W = -2.5 K and an effective moment for the Pr3+ of {\mu}eff = 2.5 {\mu}B. Magnetization versus field measurements show a spin-ice like anisotropy. 
M. Ciomaga Hatnean, C. Decorse, M. R. Lees, O. A. Petrenko, D. S.   Keeble and G. Balakrishnan
cond-mat.mtrl-sci cond-mat.str-el