Proposal on cross-tie wall and Bloch line propagation in thin magnetic films

A serial access memory is proposed based on the propagation of cross-tie walls and Bloch lines along domain walls in thin magnetic films. The techniques used to propagate bubbles may be applied to cross-tie walls and Bloch lines. This method shows promise because of the speed and density, the polycrystalline material, the large temperature range, and easy detection with a loop. The expected speed makes possible cheap detection, and as a result the need for magnetic logic is decreased. With propagation velocities within the range of domain tip velocities, a 100 MHz stepping rate can be expected. At this rate a 0.5 millivolt signal can be obtained from a loop as a Bloch line passes beneath it.