THE GROWTH AND CHARACTERIZATION OF HIGH-QUALITY UPT3 CRYSTALS

Single crystals of UPt3 have been prepared. The crystals are shown to have a superconducting transition temperature of 526 +/- 2 mK with a t ransition width of 12.6 +/- 0.1 mK. The measured x-ray rocking curve F WHM of the (002) peak is 180 +/- 5 arcseconds, compared to a theoretic al minimum linewidth as predicted for a perfect UPt3 single crystal of 90 arcseconds. The x-ray characterization, susceptibility, residual r esistivity ratio (RRR) and impurity concentration results are presente d.