Direct solvothermal crystallisation of the metastable cubic perovskite CsMnF3 and its magnetism

Abstract

The solvothermal synthesis of polycrystalline cubic CsMnF₃ at 100 °C is reported, a phase previously prepared phase-pure only at 700 °C and 30 kbar. In situ powder X-ray diffraction, shows that cubic CsMnF₃ transforms irreversibly to the 6H polymorph at ∼500 °C. The magnetic properties of cubic CsMnF₃ are characterised by G-type antiferromagnetic ordering, as determined from powder neutron diffraction.