Crystal growth and anisotropic magnetic properties of V3O7

Needle-like crystals of V3O7 up to 2 mm in length were grown by a chemical vapor transport method using NH4Cl as a transport agent. The anisotropic magnetic susceptibility was measured for the first time. At 2 K, a spin-flop transition occurs under a magnetic field of 0.1 T. V3O7 is proved to be a uniaxial antiferromagnet with its easy axis parallel to the b  -axis of monoclinic structure. A spin structure with antiferromagnetic interaction between (101¯) layers and ferromagnetic interaction in the layers below the Néel temperature (5.2 K) is suggested.

The temperature dependence of the magnetic susceptibility of V3O7 for (H∥b) and (H⊥b), respectively, at 0.1 T. The inset shows crystals of V3O7 grown by using NH4Cl as the transport agent.Figure optionsDownload as PowerPoint slide