Single crystals of Ba2PrRu1-xCuxO 6 with x=0 to 0.2, have been grown from high temperature solutions of a mixture of PbO-PbF2 in the temperature range 1100-1200°C. Thin crystals with mostly a hexagonal and triangular plate like habit measuring up to 1-2mm across and 0.1-0.2 mm thick were obtained. The size, quality and morphology of the crystals were improved by varying the solution volume as well as additives like B2O3. Large crystals measuring up to 3mm across and 0.3 to 0.5 mm thick were obtained with 5-7 wt% solute concentration and 0.5-1 wt% of B2O3. The ZFC curves exhibit a spin glass like behavior with x = 0 and a superconducting transition at 8 to 11 K depending on x - 0.05 to 0.1. The transition was also influenced by the growth temperature and post growth annealing. Powder x-ray diffraction, EDS and Raman spectroscopic measurements confirm the presence of Cu in the crystals.
- Double perovskites
- High temperature solution growth
ASJC Scopus subject areas
- Materials Science(all)
- Condensed Matter Physics