High-pressure synthesis, crystal structures, and characterization of CdVO3−δ and solid solutions CdVO3–NaVO3

CdVO3−δ and solid solutions of Cd1−xNaxVO3 with the GdFeO3-type perovskite structure were prepared using a high-pressure (6 GPa) and high-temperature technique. No significant oxygen and cation deficiency was found in CdVO3. Cd1−xNaxVO3 are formed in the compositional range of 0⩽x⩽0.20⩽x⩽0.2. CdVO3 and Cd1−xNaxVO3 demonstrate metallic conductivity and Pauli paramagnetism between 2 and 300 K. A large electronic contribution to the specific heat (γ=13.4γ=13.4 and 11.2mJ/(molK2) for CdVO3 and Cd0.8Na0.2VO3, respectively) was observed at low temperatures due to the strongly correlated electrons. Crystal structures of CdVO3 and Cd0.8Na0.2VO3 were refined by X-ray powder diffraction: space group Pnma  ; Z=4Z=4; a=5.33435(7)Å, b=7.52320(9)Å, and c=5.26394(6)Å for CdVO3 and a=5.32056(9)Å, b=7.50289(13)Å, and c=5.25902(8)Å for Cd0.8Na0.2VO3.

Graphical abstractTemperature dependence of the magnetic susceptibilities of CdVO3 and Cd0.8Na0.2VO3.Figure optionsDownload full-size imageDownload as PowerPoint slide