Toward Comprehensive Shifting Fault Tolerance for Domain-Wall Memories With PIETT

Ollivier, Sébastien; Longofono, Stephen; Dutta, Prayash; Hu, Jingtong; Bhanja, Sanjukta; Jones, Alex K.

doi:10.1109/tc.2022.3188206

Cited by 6 publications

(1 citation statement)

References 44 publications

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“…As optimizing solely for precise position control is not possible, such compromised pinning structures are inevitably accompanied by position errors. Several correction software technologies are actively being explored [34,35] to address these inevitable position errors.…”

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confidence: 99%

Position Error-Free Control of Magnetic Domain-Wall Devices via Spin-Orbit Torque Modulation

Lee

Kim

Whang

et al. 2023

Preprint

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Magnetic domain-wall devices such as racetrack memory and domain-wall shift registers facilitate massive data storage as hard disk drives with low power portability as flash memory devices. Here, the key issue to be addressed is how perfectly the domain-wall motion can be controlled without deformation, as it can replace the mechanical motion of hard disk drives. However, such domain-wall motion in real media is subject to the stochasticity of thermal agitation with quenched disorders, resulting in severe deformations with pinning and tilting. Herein, we propose a new concept of domain-wall control with a position error-free scheme. The primary idea involves spatial modulation of the sign of the spin-orbit torque along nanotrack devices. The domain wall is then locked at the modulation boundary by the compression forces from both sides under current injection. Unidirectional unlocking can be achieved based on the broken inversion symmetry of the modulation boundary geometry. The validity of the proposed scheme is confirmed via a micromagnetic simulation and experiments. In the experiments, devices with periodic modulation are observed to demonstrate position error-free operation over the entire observation range for microscale and nanoscale devices. Thus, the present error-free scheme provides the final missing puzzle in magnetic domain-wall device development.

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confidence: 99%

Position Error-Free Control of Magnetic Domain-Wall Devices via Spin-Orbit Torque Modulation

Lee

Kim

Whang

et al. 2023

Preprint

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Position error-free control of magnetic domain-wall devices via spin-orbit torque modulation

Lee,

Kim,

Whang

et al. 2023

Nat Commun

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Magnetic domain-wall devices such as racetrack memory and domain-wall shift registers facilitate massive data storage as hard disk drives with low power portability as flash memory devices. The key issue to be addressed is how perfectly the domain-wall motion can be controlled without deformation, as it can replace the mechanical motion of hard disk drives. However, such domain-wall motion in real media is subject to the stochasticity of thermal agitation with quenched disorders, resulting in severe deformations with pinning and tilting. To sort out the problem, we propose and demonstrate a new concept of domain-wall control with a position error-free scheme. The primary idea involves spatial modulation of the spin-orbit torque along nanotrack devices, where the boundary of modulation possesses broken inversion symmetry. In this work, by showing the unidirectional motion of domain wall with position-error free manner, we provide an important missing piece in magnetic domain-wall device development.

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StreamPIM: Streaming Matrix Computation in Racetrack Memory

An,

Tang,

et al. 2024

2024 IEEE International Symposium on High-Performance Computer Architecture (HPCA)

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Toward Comprehensive Shifting Fault Tolerance for Domain-Wall Memories With PIETT

Cited by 6 publications

References 44 publications

Position Error-Free Control of Magnetic Domain-Wall Devices via Spin-Orbit Torque Modulation

Position Error-Free Control of Magnetic Domain-Wall Devices via Spin-Orbit Torque Modulation

Position error-free control of magnetic domain-wall devices via spin-orbit torque modulation

StreamPIM: Streaming Matrix Computation in Racetrack Memory

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