A magnetic recording medium having a substrate, an interlayer and a
magnetic layer, the interlayer having at least a first intermediary
layer, a second intermediary layer and a third intermediary layer,
wherein the first intermediary layer or the third intermediary layer is
non-magnetic or magnetic and the second intermediary layer has a
hexagonal close pack crystal structure and a property of providing RKKY
coupling between the first intermediary layer and the third intermediary
layer when the first intermediary layer and the second intermediary layer
are magnetic layers is disclosed.