Crystal structure and properties of the magnetically frustrated B-site ordered Sr2CaOsO6 double perovskite

The B-site ordered double perovskite Sr2CaOsO6 has been synthesized by a solid-state reaction under ambient pressure. Sr2CaOsO6 is isostructural to Sr2NaOsO6 and Sr2CaReO6, thus crystallizes in the monoclinic space group P2(1)/n, in contrast to cubic lattice symmetry reported in an earlier publication. The compound remains paramagnetic down to a temperature of 2 K. This finding is of relevance with regard to the high-temperature ferromagnetism observed in Sr3OsO6 thin films and may find interest in view of possible exotic ground states in frustrated magnetic systems.

Automated summary

The B-site ordered double perovskite Sr2CaOsO6 has been synthesized by a solid-state reaction under ambient pressure. The compound crystallizes in the monoclinic space group P2(1)/n and remains paramagnetic down to a temperature of 2 K. This finding is relevant for understanding high-temperature ferromagnetism and possible exotic ground states in frustrated magnetic systems.