Antiferromagnetic storage media have been studied as an alternative to ferromagnetism,[34] especially since with antiferromagnetic material the bits can as well be stored as with ferromagnetic material. Instead of the usual definition 0 -> 'magnetisation upwards', 1 -> 'magnetisation downwards', the states can be, e.g., 0 -> 'vertically-alternating spin configuration' and 1 -> 'horizontally-alternating spin configuration'.[35]).