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ReviewMagnetic Domain-Wall Logic"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. * To whom correspondence should be addressed. E-mail: r.cowburn{at}imperial.ac.uk
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Science. ISSN 0036-8075 (print), 1095-9203 (online)
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