Cyrstal Synthesis of Novel Yb-Pt-Pb Phases

We have used flux techniques to explore the Yb-Pt-Pb ternary phase diagram, and have grown a number of intermetallic compounds including YbPt, Yb$_{3}$Pt$_{5}$, and the new~Yb$_{5}$Pt$_{9}$, YbPt$_{2}$, Yb$_{3}$Pt$_{4}$ and Yb$_{2}$Pt$_{2}$Pb, as well as Yb$_{3}$Pt$_{5}$Si and YbPtSi. The crystal structure of these different compounds will be compared. A particular focus has been the synthesis of single crystals of quantum critical antiferromagnet (AF) Yb$_{3}$Pt$_{4}$, and we show that it is possible to~synthesize crystals which are large enough for neutron diffraction measurements. Laue patterns and neutron rocking curves along with other methods show that these cyrstals are of very high quality. Initial results of neutron diffraction and inelastic scattering experiments on single Yb$_{3}$Pt$_{4}$ crystals and arrays of multiple Yb$_{3}$Pt$_{4}$ crystals will be presented.