Doping-independent 120? magnetism in the quadruple perovskite CaMn3V4O12

The magnetic structure of high-pressure quadruple perovskite CaMn3V4O12 was investigated using neutron powder diffraction data. Below TN = 54 K, the S = 52 Mn2+ spins adopt a 120 degrees arrangement in kagome layers formed of second nearest neighbor A ? sites. The V4+ electrons are itinerant and do not mediate the magnetic interactions as evidenced by the insensitivity of the magnetic structure to the valence of the vanadium cations in AMn3V4O12 (A = La3+, Ca2+).