Antidamping-Torque-Induced Switching in Biaxial Antiferromagnetic Insulators

Chen, X. Z.; Zarzuela, Ricardo; Zhang, J.; Song, Cheng; Zhou, Xuemei; Shi, Guangyuan; Li, F.; Zhou, Huaichun; Jiang, Wanjun; Pan, Feng; Tserkovnyak, Yaroslav

doi:10.1103/physrevlett.120.207204

Cited by 303 publications

(230 citation statements)

References 37 publications

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“…SOTs in Ta/IrMn/CoFeB heterostructure were investigated using the second‐harmonic resistance technique by Reichlová et al., revealing a rather complex interplay of antiferromagnetic order and SHEs in the IrMn and Ta layers. Very recently, rotation of the antiferromagnetic order by a damping‐like SOT was observed in a Pt/NiO bilayer …”

Section: Manipulation Of Magnetic Materials By Spin–orbit Torquesmentioning

confidence: 97%

Manipulation of Magnetization by Spin–Orbit Torque

Edmonds

Liu

et al. 2018

Adv Quantum Tech

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The control of magnetization by electric current is a rapidly developing area motivated by a strong synergy between breakthrough basic research discoveries and industrial applications in the fields of magnetic recording, magnetic field sensors, spintronics, and nonvolatile memories. In recent years, the discovery of spin–orbit torque has opened a spectrum of opportunities to manipulate the magnetization efficiently. This article presents a review of the historical background and recent literature focusing on spin–orbit torques (SOTs), highlighting the most exciting new scientific results and suggesting promising future research directions. It starts with an introduction and overview of the underlying physics of spin–orbit coupling effects in bulk and at interfaces, and then describes the use of SOTs to control ferromagnets and antiferromagnets. Finally, the prospects for the future development of spintronic devices based on SOTs are summarized.

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Section: Manipulation Of Magnetic Materials By Spin–orbit Torquesmentioning

confidence: 97%

Manipulation of Magnetization by Spin–Orbit Torque

Edmonds

Liu

et al. 2018

Adv Quantum Tech

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“…We solved the LLG equations numerically to find the equilibrium positon of M and N with applied currents. We find that for moderate current amplitudes that are not enough to drive Né el vector into continuous precession 9,27 , the damping-like torque's influence on magnetic dynamics is mostly to modify the equilibrium orientation of N within the easy plane. According to our modelling, in this non-precession regime, the spin torque induced in-plane tilting tends to align the Né el vector closer to the injected spin orientation (or equivalently, more perpendicular to the current flowing direction), which is opposite to the experimental observation.…”

mentioning

confidence: 90%

Quantitative Study on Current-Induced Effect in an Antiferromagnet Insulator/Pt Bilayer Film

Zhang¹,

Finley²,

Safi³

et al. 2019

Phys. Rev. Lett.

106

102

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Electrical control and detection of magnetic ordering inside antiferromagnets has attracted considerable interests, for the potential advantages in operating speed and device densities.In contrast to ferromagnets, where the current-induced torque on magnetic moments can be analyzed via comparison with magnetic field's influence, the quantitative investigation on the spin torque mechanism in antiferromagnets represents a greater challenge, due to the lack of a convenient, independent method for controlling Né el vectors. Here by utilizing an antiferromagnetic insulator with Dzyaloshinskii-Moriya interaction, α-Fe2O3, we show that the Né el vector can be easily controlled with the application of a moderate external magnetic field, which can be further used to examine the current-induced magnetic dynamics. We find that in this antiferromagnetic insulator, current-induced magnetoresistance change can be complicated by resistive switching that does not have a magnetic origin. By excluding nonmagnetic switching and comparing the current-induced and field-induced Né el vector tilting, we reveal the important role of magnetoelastic effect in current-induced dynamics of this antiferromagnet. The nature and magnitude of magnetoelastic effect is further determined and compared with possible spin orbit torque influences.

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“…Most recently, it has been confirmed both experimentally and theoretically that AFM domain in an antiferromagnet with biaxial anisotropy such as NiO film deposited on SrTiO 3 substrate could be reversed by applied electric current [29,30], which is very meaningful for the development of AFM spintronics. Taking NiO as an example to estimate the real physical values, we set the exchange stiffness A≈5×10 −13 J m −1 , a≈4.2 Å, μ s ≈1.7μ B .…”

Section: Simulation Results and Discussionmentioning

confidence: 90%

Microwave fields driven domain wall motions in antiferromagnetic nanowires

et al. 2018

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In this work, we study the microwave field driven domain wall (DW) motion in an antiferromagnetic nanowire, using the numerical calculations based on a classical Heisenberg spin model with the biaxial magnetic anisotropy. We show that a proper combination of a static magnetic field plus an oscillating field perpendicular to the nanowire axis is sufficient to drive the DW propagation along the nanowire. More importantly, the drift velocity at the resonance frequency is comparable to that induced by temperature gradients, suggesting that microwave field can be a very promising tool to control DW motions in antiferromagnetic nanostructures. The dependences of resonance frequency and drift velocity on the static and oscillating fields, the axial anisotropy, and the damping constant are discussed in details. Furthermore, the optimal orientations of the field are also numerically determined and explained. This work provides useful information for the spin dynamics in antiferromagnetic nanostructures for spintronics applications.

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Antidamping-Torque-Induced Switching in Biaxial Antiferromagnetic Insulators

Cited by 303 publications

References 37 publications

Manipulation of Magnetization by Spin–Orbit Torque

Manipulation of Magnetization by Spin–Orbit Torque

Quantitative Study on Current-Induced Effect in an Antiferromagnet Insulator/Pt Bilayer Film

Microwave fields driven domain wall motions in antiferromagnetic nanowires

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