High-pressure and high-temperature synthesis and physical properties of Ca2CrO4 solid.

The bulk Ca₂CrO₄ samples were synthesized under high pressure and high temperature conditions using CaO and CrO₂ as starting materials. The structure of the prepared Ca₂CrO₄ solid is characterized by X-ray diffraction with Rietveld refinement as tetragonal structure with the space group I4₁/acd. The CrO₆ octahedrons elongate along c axis and rotate in ab plane. DC and AC magnetic susceptibility measurement results indicate spin glass behavior at low temperature. Temperature dependence of resistivity measurement results show Ca₂CrO₄ is an insulator at both ambient condition and high pressure. [ABSTRACT FROM AUTHOR]