Spin–orbit torque-induced multiple magnetization switching behaviors in synthetic antiferromagnets

Zhu, Libai; Xu, Xiaoguang; Wang, Mengxi; Meng, Kangkang; Wu, Yong; Chen, Jikun; Miao, Jun; Jiang, Yong

doi:10.1063/5.0020925

Cited by 18 publications

(9 citation statements)

References 28 publications

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“…[21,39] It also showed that the DMI will induced multiple transitions of switching orientations between different chirality states in the spin-orbit torque-induced magnetization switching. [40] Therefore, such asymmetric phenomenon would reasonably originate from a DMI-like behavior.…”

Section: Asymmetric Occurrence Frequency Of Coupled Vorticesmentioning

confidence: 99%

Dzyaloshinskii–Moriya‐Interaction‐Like Behavior in Confined Permalloy Nanostructures via Coupled Magnetic Vortices

Shen

et al. 2023

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Dzyaloshinskii–Moriya interaction (DMI), one of antisymmetric exchanges, originates from the combination of low structural symmetry and large spin‐orbit coupling and favors magnetization rotations with fixed chirality. Herein, this work reports a DMI‐like behavior in permalloy via coupled vortices in confined structures. Under the in‐plane magnetic fields, continuous reversals of different coupled vortices are directly observed by in situ Lorentz transmission electron microscopy, and reproduced by complementary micromagnetic simulations. The statistical results show that coupled vortices with opposite chirality appear more frequently with the frequency up to about 60%. Such an asymmetric phenomenon mainly arises from a DMI‐like behavior, associated with the increased total energy difference between different ground‐state coupled vortices. Moreover, in the reversal process, the junction between disks accelerates the annihilation of vortices moving toward it and is also the starting point of vortex nucleation. These results provide an effective method to generate a DMI‐like behavior in magnetic systems with symmetry breaking surface and benefit the future development of vortex‐based spintronic devices.

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Section: Asymmetric Occurrence Frequency Of Coupled Vorticesmentioning

confidence: 99%

Dzyaloshinskii–Moriya‐Interaction‐Like Behavior in Confined Permalloy Nanostructures via Coupled Magnetic Vortices

Shen

et al. 2023

Small

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“…Recently, there have been reported of new antiferromagnetic materials with a high response speed, low power consumption, and high noise immunity to an external magnetic field, which can be used in the field of spintronics [87][88][89][90][91][92][93][94][95][96][97][98][99]. Such antiferromagnets can be divided into two types: collinear and noncollinear ones.…”

Section: Noncollinear Antiferromagnets Based On Mn3z Heusler Alloysmentioning

confidence: 99%

Unusual Kinetic Properties of Usual Heusler Alloys

Марченков

Irkhin

Семянникова

2022

J Supercond Nov Magn

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The review considers various groups of Heusler compounds, which can have the properties of a semiconductor, a half-metallic ferromagnet, a spin gapless semiconductor, a topological semimetal, and a noncollinear antiferromagnet. In these Heusler compounds, "conventional" from the point of view of the crystal structure, unusual kinetic and magnetic properties can be observed, which are caused by the features of their electronic structure (e.g., presence of an energy gap for one spin projection) and magnetic state (e.g., strong ferromagnetism, compensated ferrimagnetism, etc.). Their magnetic and kinetic characteristics are very sensitive to external influences. Depending on the alloy composition and external parameters, transitions between the considered states can be realized. All this opens up further prospects for controlling the electronic and magnetic characteristics of such compounds and their practical application.

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“…Spin-orbit torques [1][2][3][4][5][6][7][8] in heavy metal/ferromagnet (HM/FM) systems have become a powerful approach to achieving a pure current control of magnetization switch for building an energy-efficient SOT-magnetoresistive random-access memory (SOT-MRAM) [9] and excitation of coherent spin waves for magnon-based logic devices [10,11] or spin synchronization-based neuromorphic computing [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of spin-orbit torque efficiency by tailoring interfacial spin-orbit coupling in Pt-based magnetic multilayers

et al. 2022

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We study inserting Co layer thickness-dependent spin transport and spin-orbit torques (SOTs) in the Pt/Co/Py trilayers by spin-torque ferromagnetic resonance. The interfacial perpendicular magnetic anisotropy (IPMA) energy density (K s = 2.7 erg/cm2), which is dominated by interfacial spin-orbit coupling (ISOC) in the Pt/Co interface, total effective spin-mixing conductance (G eff,tot ↑↓=0.42×15 Ω-1 m-2) and two-magnon scattering (β TMS= 0.46 nm2) are first characterized, and the damping-like torque (ξDL= 0.103) and field-like torque (ξFL=-0.017) efficiencies are also calculated quantitatively by varying the thickness of the inserting Co layer. The significant enhancement of ξDL and ξFL in Pt/Co/Py than Pt/Py bilayer system originates from the interfacial Rashba-Edelstein effect due to the strong ISOC between Co-3d and Pt-5d orbitals at the Pt/Co interface. Additionally, we find a considerable out-of-plane spin polarization SOT, which is ascribed to the spin anomalous Hall effect and possible spin precession effect due to IPMA-induced perpendicular magnetization at the Pt/Co interface. Our results demonstrate that the ISOC of the Pt/Co interface plays a vital role in spin transport and SOTs-generation. Our finds offer an alternative approach to improve the conventional SOTs efficiencies and generate unconventional SOTs with out-of-plane spin polarization to develop low power Pt-based spintronic via tailoring the Pt/FM interface.

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Spin–orbit torque-induced multiple magnetization switching behaviors in synthetic antiferromagnets

Cited by 18 publications

References 28 publications

Dzyaloshinskii–Moriya‐Interaction‐Like Behavior in Confined Permalloy Nanostructures via Coupled Magnetic Vortices

Dzyaloshinskii–Moriya‐Interaction‐Like Behavior in Confined Permalloy Nanostructures via Coupled Magnetic Vortices

Unusual Kinetic Properties of Usual Heusler Alloys

Enhancement of spin-orbit torque efficiency by tailoring interfacial spin-orbit coupling in Pt-based magnetic multilayers

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