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Title: The effect of output-input isolation on the scaling and energy consumption of all-spin logic devices

Abstract

All-spin logic (ASL) is a novel approach for digital logic applications wherein spin is used as the state variable instead of charge. One of the challenges in realizing a practical ASL system is the need to ensure non-reciprocity, meaning the information flows from input to output, not vice versa. One approach described previously, is to introduce an asymmetric ground contact, and while this approach was shown to be effective, it remains unclear as to the optimal approach for achieving non-reciprocity in ASL. In this study, we quantitatively analyze techniques to achieve non-reciprocity in ASL devices, and we specifically compare the effect of using asymmetric ground position and dipole-coupled output/input isolation. For this analysis, we simulate the switching dynamics of multiple-stage logic devices with FePt and FePd perpendicular magnetic anisotropy materials using a combination of a matrix-based spin circuit model coupled to the Landau–Lifshitz–Gilbert equation. The dipole field is included in this model and can act as both a desirable means of coupling magnets and a source of noise. The dynamic energy consumption has been calculated for these schemes, as a function of input/output magnet separation, and the results show that using a scheme that electrically isolates logic stages produces superiormore » non-reciprocity, thus allowing both improved scaling and reduced energy consumption.« less

Authors:
;
Publication Date:
OSTI Identifier:
22409964
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANISOTROPY; ASYMMETRY; COMPARATIVE EVALUATIONS; COUPLING; DIFFERENTIAL EQUATIONS; DIPOLES; ENERGY CONSUMPTION; INTERMETALLIC COMPOUNDS; IRON; MAGNETS; PALLADIUM; PLATINUM; SPIN

Citation Formats

Hu, Jiaxi, Haratipour, Nazila, and Koester, Steven J., E-mail: skoester@umn.edu. The effect of output-input isolation on the scaling and energy consumption of all-spin logic devices. United States: N. p., 2015. Web. doi:10.1063/1.4915907.
Hu, Jiaxi, Haratipour, Nazila, & Koester, Steven J., E-mail: skoester@umn.edu. The effect of output-input isolation on the scaling and energy consumption of all-spin logic devices. United States. https://doi.org/10.1063/1.4915907
Hu, Jiaxi, Haratipour, Nazila, and Koester, Steven J., E-mail: skoester@umn.edu. 2015. "The effect of output-input isolation on the scaling and energy consumption of all-spin logic devices". United States. https://doi.org/10.1063/1.4915907.
@article{osti_22409964,
title = {The effect of output-input isolation on the scaling and energy consumption of all-spin logic devices},
author = {Hu, Jiaxi and Haratipour, Nazila and Koester, Steven J., E-mail: skoester@umn.edu},
abstractNote = {All-spin logic (ASL) is a novel approach for digital logic applications wherein spin is used as the state variable instead of charge. One of the challenges in realizing a practical ASL system is the need to ensure non-reciprocity, meaning the information flows from input to output, not vice versa. One approach described previously, is to introduce an asymmetric ground contact, and while this approach was shown to be effective, it remains unclear as to the optimal approach for achieving non-reciprocity in ASL. In this study, we quantitatively analyze techniques to achieve non-reciprocity in ASL devices, and we specifically compare the effect of using asymmetric ground position and dipole-coupled output/input isolation. For this analysis, we simulate the switching dynamics of multiple-stage logic devices with FePt and FePd perpendicular magnetic anisotropy materials using a combination of a matrix-based spin circuit model coupled to the Landau–Lifshitz–Gilbert equation. The dipole field is included in this model and can act as both a desirable means of coupling magnets and a source of noise. The dynamic energy consumption has been calculated for these schemes, as a function of input/output magnet separation, and the results show that using a scheme that electrically isolates logic stages produces superior non-reciprocity, thus allowing both improved scaling and reduced energy consumption.},
doi = {10.1063/1.4915907},
url = {https://www.osti.gov/biblio/22409964}, journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 17,
volume = 117,
place = {United States},
year = {Thu May 07 00:00:00 EDT 2015},
month = {Thu May 07 00:00:00 EDT 2015}
}