Logic Gates Based on Synthetic Antiferromagnetic Bilayer Skyrmions

Fattouhi, Mouad; Mak, K. Y.; Zhou, Yan; Zhang, Xichao; Liu, Xiaoxi; Hafidi, Mohamed El

doi:10.1103/physrevapplied.16.014040

Cited by 26 publications

(17 citation statements)

References 77 publications

(76 reference statements)

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“…The adders and logic gate operation are demonstrated using micromagnetic simulations performed on the GPU-accelerated open-source micromagnetic simulator software package MuMax3 [41], which have been used in simulating SyAF system as reported in Ref. [42][43][44][45].…”

Section: Model and Methodsmentioning

confidence: 99%

Single-bit full adder and logic gate based on synthetic antiferromagnetic bilayer skyrmions

et al. 2022

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Skyrmion-based devices are promising candidates for non-volatile memory and low-delay time computation. Many skyrmion-based devices execute operation by controlling skyrmion trajectory, which can be impeded by the skyrmion Hall effect. Here, the design of skyrmionbased arithmetic device built on synthetic antiferromagnetic (SyAF) structures are presented, where the structure can greatly suppress skyrmion Hall effect. In this study, the operations of skyrmion-based half adder, full adder and XOR logic gate are executed by introducing geometric notches and tilted edges, which can annihilate or diverge skyrmion. Performance of these skyrmion-based devices are evaluated, where the delay time and energy-delay product of the single-bit full adder are 1.95 ns and 2.50 × 10 −22 Js , which are only 12% and 79% of the previously proposed skyrmion-based adder. This improvement is significant in the construction of ripple-carry adder and ripple-carry adder-subtracter. Therefore, our skyrmion-based SyAF arithmetic device are promising candidate to develop high-speed spintronic devices.

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Section: Model and Methodsmentioning

confidence: 99%

Single-bit full adder and logic gate based on synthetic antiferromagnetic bilayer skyrmions

et al. 2022

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“…magnetic skyrmions have also been proposed in recent years. [184,185,[188][189][190][191][192] Zhang et al were the first to propose a device with "Y"-shaped junction channels connecting inputs and outputs to control the duplication and merging of skyrmions and further constructed logic AND and OR gates. [188] Luo et al reported an architecture for reconfigurable skyrmion logic gates (Figure 12C) implementing SOT, SkHE, skyrmion-edge interactions, and skyrmion-skyrmion interactions.…”

Section: Other Applications: Logic and Magnonic Devicesmentioning

confidence: 99%

“…[185,189] Replacing ferromagnetic skyrmions and logic gates using AFSKs structures with better stability and mobility as information carriers were also designed. [190,191] Besides conventional binary computing, stochastic computing implemented by skyrmionic logic devices is also possible. [192] In addition, particlelike skyrmions with noncolinear spin nature and internal excitation modes contribute to future magnonic devices for manipulating spin waves.…”

Section: Other Applications: Logic and Magnonic Devicesmentioning

confidence: 99%

Magnetic skyrmions: Basic properties and potential applications

Wang

2023

Interdisciplinary Materials

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Magnetic skyrmions are particle‐like topological magnetic textures that are potential information carriers in future spintronics. An enormous body of research confirms their existence in a broad range of magnetic materials since their first discovery in 2009. To date, magnetic skyrmions can not only be found in asymmetric systems but also in centrosymmetric ones. Notably, engineered magnetic multilayers are promising structures for skyrmion‐based spintronics because they can stabilize small‐sized skyrmions at room temperature and facilitate their electric manipulation. In this overview, we introduce the topological nature, their special properties, and nucleation methods of skyrmions, and show their potential for applications. Perspectives on skyrmionic devices and developments toward other, more three‐dimensional particle‐like magnetic nanostructures, are discussed at the end.

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“…These textures appear promising for logic-inmemory applications since they intrinsically merge highdensity nonvolatile storage and logic capabilities. However, while a number of memory and logic concepts have been proposed based on skyrmions [1][2][3][4][5][6][7][8][9][10][11][12], several major issues have hindered their technological advancement. In a skyrmion racetrack [13], data is encoded through the distance between neighboring skyrmions and the memory operation relies on the synchronous shift of skyrmion trains, where the skyrmion interdistance remains constant.…”

Section: Introductionmentioning

confidence: 99%

Robust and Programmable Logic-In-Memory Devices Exploiting Skyrmion Confinement and Channeling Using Local Energy Barriers

et al. 2022

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Magnetic skyrmions are promising candidates for logic-in-memory applications, intrinsically merging high-density nonvolatile data storage with computing capabilities, owing to their nanoscale size, fast motion, and mutual repulsions. However, concepts proposed so far suffer from reliability issues as well as inefficient conversion of magnetic information to electrical signals. In this paper, we propose a logicin-memory device, which exploits skyrmion confinement and channeling using anisotropy energy barriers to achieve reliable data storage and synchronous shift in racetracks combined with cascadable and reprogrammable logics relying purely on magnetic interactions. The device combines a racetrack shift register based on skyrmions confined in nanodots with full-adder (FA) gates. The designed FA is reprogrammable and cascadable and can also be used to perform simple logic operations such as AND, OR, NOT, NAND, XOR, and NXOR. The monolithic design of the logic gate and the absence of any complex electrical contacts makes the device ideal for integration with conventional CMOS circuitry.

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Logic Gates Based on Synthetic Antiferromagnetic Bilayer Skyrmions

Cited by 26 publications

References 77 publications

Single-bit full adder and logic gate based on synthetic antiferromagnetic bilayer skyrmions

Single-bit full adder and logic gate based on synthetic antiferromagnetic bilayer skyrmions

Magnetic skyrmions: Basic properties and potential applications

Robust and Programmable Logic-In-Memory Devices Exploiting Skyrmion Confinement and Channeling Using Local Energy Barriers

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