Device operating on the displacement of magnetic domain walls

摘要

In a device operating on the displacement of magnetic domain walls and comprising a layer of magnetizable material having an easy axis of magnetization normal to the plane of the layer, in which layer magnetic domain walls exist, the presence in the walls of an internal magnetic field directed parallel to the plane of the layer ensures that the walls can be displaced with higher velocity. Said internal field is created by providing on the first layer a second layer of magnetizable material having an easy axis of magnetization normal to the plane of the layer, the saturation magnetization of the second layer being higher than that of the first layer.