Structural transition and unusually strong antiferromagnetic superexchange coupling in perovskite KAgF3†‡
Abstract
High-purity samples of potassium trifluoroargentate(II), KAgF3, have been obtained via a novel synthetic pathway. This compound is found to exhibit an order–disorder phase transition around 230 K. Susceptibility measurements indicate that KAgF3 exhibits strong antiferromagnetic (