Domain walls speed up in insulating ferrimagnetic garnets

Caretta, Lucas; Avci, Can Onur

doi:10.1063/5.0159669

Cited by 8 publications

(3 citation statements)

References 118 publications

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“…For the Pt/GdFeCo wire, the Pt has a positive spin Hall angle. Therefore, the DW is moved along the current flow when it is a left-handed chiral Néel DW [15,30,31]. STT is caused by a spin current inside the magnetic layer.…”

Section: Resultsmentioning

confidence: 99%

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Comparison of Current Induced Domain Wall Motion Driven by Spin Transfer Torque and by Spin Orbit Torque in Ferrimagnetic GdFeCo Wires

Thach,

Sumi,

Tanabe

et al. 2024

Magnetochemistry

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Current-induced domain wall motion (CIDWM) in magnetic wires can be driven by spin transfer torque (STT) originating from transferring angular momentums of spin-polarized conducting electrons to the magnetic DW and can be driven by spin orbit torque (SOT) originating from the spin Hall effect (SHE) in a heavy metal layer and Dzyaloshinsky Moriya (DMI) generated at an interface between a heavy metal layer and a magnetic layer. In this work, we carried out a comparative study of CIDWM driven by STT and by SOT in ferrimagnetic GdFeCo wires with magnetic perpendicular anisotropy based on structures of SiN (10 nm)/GdFeCo (8 nm)/SiN (10 nm) and Pt (5 nm)/GdFeCo (8 nm)/SiN (10 nm). We found that CIDWM driven by SOT exhibited a much lower critical current density (JC), and much higher DW mobility (µDW). Our work might be useful for the realization and the development of low-power and high-speed memory devices.

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Section: Resultsmentioning

confidence: 99%

“…The direction of th motion depends on the sign of the spin Hall angle of the heavy metal layer as well chirality of the Néel DW. For the Pt/GdFeCo wire, the Pt has a positive spin Hall Therefore, the DW is moved along the current flow when it is a left-handed chira DW [15,30,31].…”

Section: Resultsmentioning

confidence: 99%

Comparison of Current Induced Domain Wall Motion Driven by Spin Transfer Torque and by Spin Orbit Torque in Ferrimagnetic GdFeCo Wires

Thach,

Sumi,

Tanabe

et al. 2024

Magnetochemistry

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“…Since the AF coupling does not require a spacer layer, the exchange coupling between these elements can be stronger than in SAF structures. The DW mobility is maximized when the angular momentum of both sublattices is compensated, either by varying the temperature or composition [ 54 , 76 , 77 , 78 , 79 , 80 ]. DW velocities of 3 km/s were observed in Ni-doped Mn 4 N using STT [ 52 ] and 5 km/s in Pt/CoGd using SOT [ 53 ].…”

Section: Physics and Materials Research For Fast Current-driven Dw Mo...mentioning

confidence: 99%

Progress in Spin Logic Devices Based on Domain-Wall Motion

Vermeulen,

Sorée,

Couet

et al. 2024

Micromachines

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Spintronics, utilizing both the charge and spin of electrons, benefits from the nonvolatility, low switching energy, and collective behavior of magnetization. These properties allow the development of magnetoresistive random access memories, with magnetic tunnel junctions (MTJs) playing a central role. Various spin logic concepts are also extensively explored. Among these, spin logic devices based on the motion of magnetic domain walls (DWs) enable the implementation of compact and energy-efficient logic circuits. In these devices, DW motion within a magnetic track enables spin information processing, while MTJs at the input and output serve as electrical writing and reading elements. DW logic holds promise for simplifying logic circuit complexity by performing multiple functions within a single device. Nevertheless, the demonstration of DW logic circuits with electrical writing and reading at the nanoscale is still needed to unveil their practical application potential. In this review, we discuss material advancements for high-speed DW motion, progress in DW logic devices, groundbreaking demonstrations of current-driven DW logic, and its potential for practical applications. Additionally, we discuss alternative approaches for current-free information propagation, along with challenges and prospects for the development of DW logic.

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