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Computing with spins and magnets

Published online by Cambridge University Press:  14 August 2014

Behtash Behin-Aein ,
Jian-Ping Wang  and
Roland Wiesendanger
Behtash Behin-Aein
Affiliation:
GlobalFoundries, USA; [email protected]
Jian-Ping Wang
Affiliation:
University of Minnesota, USA; [email protected]
Roland Wiesendanger
Affiliation:
Department of Physics, University of Hamburg, Germany; [email protected]
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Abstract

The possible use of spin and magnets in place of charge and capacitors, respectively, to store and process information is well known. Magnetic tunnel junctions are being widely investigated and developed for magnetic random access memories. These are two terminal devices that change their resistance based on switchable magnetization of magnetic materials. They utilize the interaction between electron spin and magnets to read information from the magnets and write onto them. Such advances in memory devices could also translate into a new class of logic devices that offer the advantage of nonvolatile and reconfigurable information processing over transistors. Logic devices having a transistor-like gain and directionality could be used to build integrated circuits without the need for transistor-based amplifiers and clocks at every stage. We review device characteristics and basic logic gates that compute with spins and magnets from the mesoscopic to the atomic scale, as well as materials, integration, and fabrication challenges and methods.

Keywords

spintronicsmagneticscanning tunneling microscopymagnetoresistancememory
Type
Research Article
Information
MRS Bulletin , Volume 39 , Issue 8: New Materials for Post-Si Computing , August 2014 , pp. 696 - 702
Copyright
Copyright © Materials Research Society 2014 

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