Abstract
The domain-wall (DW)-magnetic tunnel junction (MTJ) device implements universal Boolean logic in a manner that is naturally compact and cascadable. However, an evaluation of the energy efficiency of this emerging technology for standard logic applications is still lacking. In this article, we use a previously developed compact model to construct and benchmark a 32-bit adder entirely from DW-MTJ devices that communicates with DW-MTJ registers. The results of this large-scale design and simulation indicate that while the energy cost of systems driven by spin-Transfer torque (STT) DW motion is significantly higher than previously predicted, the same concept using spin-orbit torque (SOT) switching benefits from an improvement in the energy per operation by multiple orders of magnitude, attaining competitive energy values relative to a comparable CMOS subprocessor component. This result clarifies the path toward practical implementations of an all-magnetic processor system.
Original language | English (US) |
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Article number | 8910439 |
Pages (from-to) | 188-196 |
Number of pages | 9 |
Journal | IEEE Journal on Exploratory Solid-State Computational Devices and Circuits |
Volume | 5 |
Issue number | 2 |
DOIs | |
State | Published - Dec 2019 |
Keywords
- Benchmarking
- domain wall (DW)
- magnetic logic
- magnetic tunnel junction (MTJ)
- post-CMOS logic
- spintronics
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Hardware and Architecture
- Electrical and Electronic Engineering