High-pressure crystal growth and electromagnetic properties of 5d double-perovskite Ca3OsO6

Single crystals of the osmium-containing compound Ca3OsO6 have been successfully grown under high-pressure conditions, for the first time. The crystal structure of Ca3OsO6 were characterized as an ordered double-perovskite structure of space group P21/n with the Ca and Os atoms being fully ordered at the perovskite B-site. The electromagnetic analysis shows that the crystal exhibits a semiconductor-like behavior below 300 K and undergoes an antiferromagnetic transition at 50 K.

Graphical AbstractSchematic image of crystal structure of Ca3OsO6 as determined by X-ray diffraction, where the gray and black octahedrons are occupied by Ca and Os, respectively. Top inset reveals an optic image of a typical Ca3OsO6 single crystal.Figure optionsDownload as PowerPoint slideHighlights
► Single crystals of Ca3OsO6 have been successfully grown under high-pressure.
► Ca3OsO6 crystalizes into an ordered double-perovskite structure.
► The Ca3OsO6 undergoes an antiferromagnetic transition at 50 K.