Functional domain wall propagation wire devices for use in digital applications

A new type of anisotropic Permalloy wire was disclosed recently[1] within which reverse magnetized domains can be created and propagated by controlled fields. It offers a flexible yet simple technology that is especially suitable for realizing frequently-used functional logic packages. The domain wall propagation phenomenon of such wires is reviewed in this paper and attractive device applications outlined. Some of these applications are discussed in detail in companion papers.[2],[3] An attempt is made to characterize this type wire according to its logic capabilities and to assess the merits of the associated technology.