A new S = 1/2 stacked kagomé lattice compound showing two successive ferromagnetic transitions

Abstract

A new V⁴⁺-based selenite compound Na₆V₇(SeO₃)₈O₆F₆ was synthesized by the hydrothermal method, exhibiting a rare S = 1/2 stacked kagomé lattice built by corner-sharing VO₆ zigzag chains along the c-axis, while face-shared VF₆ linear chains are located inside the hexagonal channels. Magnetic measurements indicate that this compound possesses two successive ferromagnetic transitions at low temperature.