Enhancement of spin–orbit torque in WTe2/perpendicular magnetic anisotropy heterostructures

Lv, Wenxing; Xue, Hongwei; Cai, Jialin; Chen, Qian; Zhang, Baoshun; Zhang, Zongzhi; Zeng, Zhongming

doi:10.1063/5.0039069

Cited by 13 publications

(6 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 12,13 ] It has been reported in the literature that magnetic ordering has been detected in 2D materials with long spin relaxation times and spin diffusion lengths. [ 5,14 ] 2D TMDs with strong spin–orbit coupling can generate large magnetic anisotropy and band splitting to suppress thermal perturbation effects and thus maintain long‐range magnetic coupling. These materials have intrinsic long‐range magnetic order, and their magnetic properties have a clear dependence on the number of layers, and when the thickness of the bulk system is reduced to the monolayer limit, they usually exhibit a significantly different magnetic behavior from the bulk and few‐layer samples.…”

Section: D Transition Metal Dichalcogenidesmentioning

confidence: 99%

Emerging Enhancement and Regulation Strategies for Ferromagnetic 2D Transition Metal Dichalcogenides

Yang,

Hu,

Yang

et al. 2023

Advanced Science

View full text Add to dashboard Cite

Two‐dimensional transition metal dichalcogenides (2D TMDs) present promising applications in various fields such as electronics, optoelectronics, memory devices, batteries, superconductors, and hydrogen evolution reactions due to their regulable energy band structures and unique properties. For emerging spintronics applications, materials with excellent room‐temperature ferromagnetism are required. Although most transition metal compounds do not possess room‐temperature ferromagnetism on their own, they are widely modified by researchers using the emerging strategies to engineer or modulate their intrinsic properties. This paper reviews recent enhancement approaches to induce magnetism in 2D TMDs, mainly using doping, vacancy defects, composite of heterostructures, phase modulation, and adsorption, and also by electron irradiation induction, O plasma treatment, etc. On this basis, the produced effects of these methods for the introduction of magnetism into 2D TMDs are compressively summarized and constructively discussed. For perspective, research on magnetic doping techniques for 2D TMDs materials should be directed toward more reliable and efficient directions, such as exploring advanced design strategies to combine dilute magnetic semiconductors, antiferromagnetic semiconductors, and superconductors to develop new types of heterojunctions; and advancing experimentation strategies to fabricate the designed materials and enable their functionalities with simultaneously pursuing the upscalable growth methods for high‐quality monolayers to multilayers.

show abstract

Section: D Transition Metal Dichalcogenidesmentioning

confidence: 99%

Emerging Enhancement and Regulation Strategies for Ferromagnetic 2D Transition Metal Dichalcogenides

Yang,

Hu,

Yang

et al. 2023

Advanced Science

View full text Add to dashboard Cite

show abstract

“…Recently, the hybrid between 2D vdW materials with HM/FM films has proved to be a good candidate for energy-efficient SOT devices (Xie et al, 2019;Debashis et al, 2020;Lv et al, 2021). It was experimentally demonstrated that the SOT efficiency in Pt/ (Co/Ni) 2 was 17 times enhanced by MoS 2 underlayer (Xie et al, 2019), but the underlying mechanisms need to be further investigated.…”

Section: Performance Modulation Of Conventional Sot Devices By 2d Vdw Materialsmentioning

confidence: 99%

Two-Dimensional Van Der Waals Materials for Spin-Orbit Torque Applications

Tian

Zhu

Jalali

et al. 2021

Front. Nanotechnol.

Self Cite

View full text Add to dashboard Cite

Spin-orbit torque (SOT) provides an efficient approach to control the magnetic state and dynamics in different classes of materials. Recent years, the crossover between two-dimensional van der Waals (2D vdW) materials and SOT opens a new prospect to push SOT devices to the 2D limit. In this mini-review, we summarize the latest progress in 2D vdW materials for SOT applications, highlighting the comparison of the performance between devices with various structures. It is prospected that the large family of 2D vdW materials and numerous combinations of heterostructures will widely extend the material choices and bring new opportunities to SOT devices in the future.

show abstract

“…Charge current injection along the low-symmetry a axis of WTe 2 generates an unconventional, out-of-plane anti-damping SOT, boldτADOOP, of the form boldmtruê×boldztruê×boldmtruê ( boldmtruê,boldztruê are unit vectors along ferromagnet magnetization and WTe 2 /ferromagnet interface) ( 28 , 29 ). This anti-damping-like torque, termed so as it acts against the ferromagnet’s intrinsic Gilbert damping from effective magneto-crystalline anisotropy field, can be used for field-free switching of PMA ferromagnets ( 24 – 26 , 30 ). Theoretical studies into the microscopic origin of the unconventional torque point to the spin-Hall effect as the major contributing factor ( 29 ).…”

Section: Introductionmentioning

confidence: 99%

Field-free deterministic switching of all–van der Waals spin-orbit torque system above room temperature

Kajale,

Nguyen,

Hung

et al. 2024

Sci. Adv.

View full text Add to dashboard Cite

Two-dimensional van der Waals (vdW) magnetic materials hold promise for the development of high-density, energy-efficient spintronic devices for memory and computation. Recent breakthroughs in material discoveries and spin-orbit torque control of vdW ferromagnets have opened a path for integration of vdW magnets in commercial spintronic devices. However, a solution for field-free electric control of perpendicular magnetic anisotropy (PMA) vdW magnets at room temperatures, essential for building compact and thermally stable spintronic devices, is still missing. Here, we report a solution for the field-free, deterministic, and nonvolatile switching of a PMA vdW ferromagnet, Fe 3 GaTe 2 , above room temperature (up to 320 K). We use the unconventional out-of-plane anti-damping torque from an adjacent WTe 2 layer to enable such switching with a low current density of 2.23 × 10 6 A cm −2 . This study exemplifies the efficacy of low-symmetry vdW materials for spin-orbit torque control of vdW ferromagnets and provides an all-vdW solution for the next generation of scalable and energy-efficient spintronic devices.

show abstract

Enhancement of spin–orbit torque in WTe2/perpendicular magnetic anisotropy heterostructures

Cited by 13 publications

References 40 publications

Emerging Enhancement and Regulation Strategies for Ferromagnetic 2D Transition Metal Dichalcogenides

Emerging Enhancement and Regulation Strategies for Ferromagnetic 2D Transition Metal Dichalcogenides

Two-Dimensional Van Der Waals Materials for Spin-Orbit Torque Applications

Field-free deterministic switching of all–van der Waals spin-orbit torque system above room temperature

Contact Info

Product

Resources

About