Single-crystal low-temperature magnetisation studies of Cs2K[Mn(CN)6]

Abstract

The magnetisation in single monoclinic crystals of Cs₂K[Mn(CN)₆] has been measured from 2 to 300 K and from 0.5 to 5 T along the [100], [010], [001] and [011] crystal directions. The data, with no symmetry approximations, can be fitted by the same general ligand-field model that was used for Cs₂K[Fe(CN)₆]. Hardly significant changes in the already small ligand-field parameters and appropriate changes in the metal parameters were required. Such approximate transferability of a ligand-field model, between 3d⁴ and 3d⁵ low-spin systems which have very different magnetic behaviour, encourages belief in the utility and reality of ligand-field modelling.