Magnetic domain wall logic requires new synthesis methodologies

The demonstration of NOT and OR logic gates using magnetic domain walls could suggest that digital circuit design methodology may apply directly to this new technology to build complex circuits. In this paper, the authors show that the use of an external rotating field which propagates domain walls of opposite magnetization at different times, reveals unforeseen delays which modify the operation of sequential logic circuits. To overcome this difficulty, the authors present a new device capable of re-synchronizing the signals