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Science 9 September 2005:
Vol. 309. no. 5741, pp. 1688 - 1692
DOI: 10.1126/science.1108813
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Review

Magnetic Domain-Wall Logic

D. A. Allwood,1 G. Xiong,2 C. C. Faulkner,3 D. Atkinson,2 D. Petit,3 R. P. Cowburn3,4*

"Spintronics," in which both the spin and charge of electrons are used for logic and memory operations, promises an alternate route to traditional semiconductor electronics. A complete logic architecture can be constructed, which uses planar magnetic wires that are less than a micrometer in width. Logical NOT, logical AND, signal fan-out, and signal cross-over elements each have a simple geometric design, and they can be integrated together into one circuit. An additional element for data input allows information to be written to domain-wall logic circuits.

1 Department of Engineering Materials, University of Sheffield, Sir Robert Hadfield Building, Portobello Street, Sheffield S1 3JD, UK.
2 Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK.
3 Blackett Physics Laboratory, Imperial College London, Prince Consort Road, London SW7 2BW, UK.
4 Durham Magneto Optics Ltd., The University of Durham, Durham DH1 3HP, UK.

* To whom correspondence should be addressed. E-mail: r.cowburn{at}imperial.ac.uk

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