Synthesis, crystal structure and magnetic property of a new cobalt(II) vanadate

• Hydrothermal reaction of CoCl2·6H2O and Na3VO4 yielded a new cobalt(||) vanadate.
• It shows novel structure since its large Co/V ratio.
• It shows long-range spin-canting antiferromagnetic ordering below ~71 K.
• Metamagnetic behavior was detected in the isothermal magnetization at 2 K.

A new cobalt(II) vanadate has been synthesized by hydrothermal reaction. It exhibits 3D cobalt(II) oxide architecture with Co12 member ring (MR) and Co6 MR tunnels along c-axis. V(2)O4 tetrahedra are located at the center of Co6-MR tunnels whereas V(1)O4 tetrahedra and ‘isolated’ 1D Co(1)O6 octahedral chains are located at the Co12-MR tunnels. The 3D cobalt(II) oxide architecture is constructed on irregular ladder chains formed by edge- and face-sharing of Co(2)O6 octahedra whereas the ‘isolated’ 1D Co(1)O6 octahedral chain in the tunnels are formed by face-sharing of Co(1)O6 octahedra. Magnetic property is investigated by means of magnetic susceptibility, magnetization and heat capacity measurement. Magnetic susceptibility and heat capacity measurement indicate a typical long-range spin-canting antiferromagnetic ordering below ~71 K; metamagnetic behavior was detected in the isothermal magnetization measurement at 2 K.

A cobalt(II) vanadate, Co7V4O16(OH)2(H2O) has been synthesized and structurally characterized. It exhibits antiferromagnetic interaction with weak spin-canting below ~71 K; metamagnetic behavior was detected in isothermal magnetization at 2 K.Figure optionsDownload as PowerPoint slide