Magnetic order in the first hybrid layered fluoroperovskites

Layered perovskites are well known functional materials but, in the context of fluoride chemistry, have so far been restricted to purely inorganic examples: K2NiF4 is the classic example. On the contrary, hybrid perovskites (i.e. those containing organic moieties between inorganic layers) are currently revolutionising the field of solar cells materials, with the development of hybrid layered lead iodides. There are no fluoride-containing examples. We have recently prepared the first examples of a family of layered perovskite fluorides incorporating organic inter-layer species. We expect these compounds to be of interest for their magnetic properties, rather than optical-based properties. Here we aim to study the magnetic ordering in the first examples of this new family. In particular, we'll look at a new hybrid cobalt fluoride, which shows a large, reversible magnetisation below ~ 80 K