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Proceedings Paper

Field-coupled nanomagnets for logic applications
Author(s): Alexandra Imre; Gyorgy Csaba; Lili Ji; Alexei Orlov; Gary H. Bernstein; Vitali Metlushko; Wolfgang Porod
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Paper Abstract

Nanomagnets that exhibit only two stable states of magnetization can be used to store digital bits. This concept is already applied in today’s magnetic random access memories. Interacting networks of such nanomagnets with physical spacing on the order of 10 nm between them have been proposed to propagate and process binary information by means of magnetic coupling. These networks, called magnetic quantum-dot cellular automata (MQCA), offer very low power dissipation and high integration density of functional devices. In addition, MQCA can operate over a wide temperature range from sub-Kelvin to the Curie temperature of the applied ferromagnetic material. We demonstrate room temperature operation of logic gates made of NiFe alloy and fabricated by electron-beam lithography on silicon. Dipolar ordering in the nanomagnet-networks is imaged by magnetic force microscopy, and the operation is explained by means of micromagnetic simulations.

Paper Details

Date Published: 28 June 2005
PDF: 9 pages
Proc. SPIE 5838, Nanotechnology II, (28 June 2005); doi: 10.1117/12.613974
Show Author Affiliations
Alexandra Imre, Univ. of Notre Dame (United States)
Gyorgy Csaba, Technische Univ. Munchen (Germany)
Lili Ji, Univ. of Notre Dame (United States)
Alexei Orlov, Univ. of Notre Dame (United States)
Gary H. Bernstein, Univ. of Notre Dame (United States)
Vitali Metlushko, Univ. of Illinois at Chicago (United States)
Wolfgang Porod, Univ. of Notre Dame (United States)

Published in SPIE Proceedings Vol. 5838:
Nanotechnology II
Paolo Lugli; Laszlo B. Kish; Javier Mateos, Editor(s)

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