Growth Of Euo Single Crystals At Reduced Temperatures

Single crystals of (Eu1-xBax)O have been grown in a molten barium-magnesium metal flux at temperatures up to 1000 degrees C, producing single crystals of (Eu1-xBax)O with barium doping levels ranging from x = 0.03 to x = 0.25. Magnetic measurements show that the ferromagnetic Curie temperature T-C correlates with the Ba doping levels, and a modified Heisenberg model was used to describe the stoichiometry dependence of T-C. Extrapolation of the results indicates that a sample with Ba concentration of x = 0.72 should have a T-C of 0 K, potentially producing a quantum phase transition in this material.