Abstract
Single crystals of have been grown in a molten barium-magnesium metal flux at temperatures up to 1000 °C, producing single crystals of with barium doping levels ranging from to . Magnetic measurements show that the ferromagnetic Curie temperature correlates with the Ba doping levels, and a modified Heisenberg model was used to describe the stoichiometry dependence of . Extrapolation of the results indicates that a sample with Ba concentration of should have a of 0 K, potentially producing a quantum phase transition in this material.
- Received 13 April 2016
DOI:https://doi.org/10.1103/PhysRevB.95.014407
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