Single crystals of (Eu1-xBax)O have been grown in a molten barium-magnesium metal flux at temperatures up to 1000 °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 TC correlates with the Ba doping levels, and a modified Heisenberg model was used to describe the stoichiometry dependence of TC. Extrapolation of the results indicates that a sample with Ba concentration of x=0.72 should have a TC of 0 K, potentially producing a quantum phase transition in this material.
© 2017 American Physical Society
Ramirez, Daniel C., Tiglet Besara, Jeffrey B. Whalen, and Theo Siegrist. "Growth of EuO single crystals at reduced temperatures." Physical Review B 95, no. 1 (2017).
Physical Review B