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Science 14 June 2002:
Vol. 296. no. 5575, pp. 2003 - 2006
DOI: 10.1126/science.1070595
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Reports

Submicrometer Ferromagnetic NOT Gate and Shift Register

D. A. Allwood, Gang Xiong, M. D. Cooke, C. C. Faulkner, D. Atkinson, N. Vernier, R. P. Cowburn*

An all-metallic submicrometer device is demonstrated experimentally at room temperature that performs logical NOT operations on magnetic logic signals. When this two-terminal ferromagnetic structure is incorporated into a magnetic feedback loop, the junction performs a frequency division operation on an applied oscillating magnetic field. Up to 11 of these junctions are then directly linked together to create a magnetic shift register.

Department of Physics, University of Durham, Rochester Building, Science Laboratories, South Road, Durham DH1 3LE, UK.
*   To whom correspondence should be addressed. E-mail: r.p.cowburn{at}durham.ac.uk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)