Changing and reversing the exchange bias in a current-in-plane spin valve by means of an electric current

Tang, Xiaoli; Zhang, Huaiwu; Su, Hua; Zhang, Zhong; Jing, Yulan

doi:10.1063/1.2786592

Cited by 46 publications

(51 citation statements)

References 15 publications

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“…However, because of scattering processes, conduction electron flow is not confined to specific layers of the EBSV structure, but can move from layer to layer, thereby transferring spin angular momentum between the layers. In a series of papers, Tang et al [30][31][32][33][34][35] reported on the effects of high CIP currents on the exchange bias in room-temperature experiments. They used a standard four-probe method to measure CIP-MR of sputtered EBSV of the form F/N/F/AFM with free F = 10-12 nm of NiFe, N = 4 nm of Cu, pinned F = 3-12 nm of NiFe and AFM = 15 nm of FeMn.…”

Section: Initial Experiments: Antiferromagnetic Spin-transfer Torque-mentioning

confidence: 99%

Antiferromagnetic metal spintronics

MacDonald

Tsoi

2011

Phil. Trans. R. Soc. A.

301

255

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In this brief review, we explain the theoretical basis for the notion that spin-transfer torques (STTs) and giant-magnetoresistance effects can, in principle, occur in circuits containing only normal and antiferromagnetic (AFM) materials, and for the notion that antiferromagnets can play a role in STT phenomena in circuits containing both ferromagnetic and AFM elements. We review the experimental literature that provides partial evidence for these AFM spintronic effects but demonstrates that, like exchangebias effects, they are sensitive to details of interface structure that are not always under experimental control. Finally, we speculate briefly on some strategies that might advance progress.

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Section: Initial Experiments: Antiferromagnetic Spin-transfer Torque-mentioning

confidence: 99%

Antiferromagnetic metal spintronics

MacDonald

Tsoi

2011

Phil. Trans. R. Soc. A.

301

255

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“…Furthermore, nonuniform current flows inherent to the point-contact technique (Wei et al, 2007) give only a qualitative picture. In addition experiments are sometimes perturbed by unstable antiferromagnetic configurations (Urazhdin and Anthony, 2007) or reconfiguration originating from Joule heating and not spin-transfer torque (Tang et al, 2007(Tang et al, , 2010Dai et al, 2008). New experimental geometries and stacks symmetries need to be proposed to obtain quantitative data.…”

Section: Seeking Spin-transfer Torque Experimentallymentioning

confidence: 99%

Antiferromagnetic spintronics

et al. 2018

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Antiferromagnetic materials could represent the future of spintronic applications thanks to the numerous interesting features they combine: they are robust against perturbation due to magnetic fields, produce no stray fields, display ultrafast dynamics, and are capable of generating large magnetotransport effects. Intense research efforts over the past decade have been invested in unraveling spin transport properties in antiferromagnetic materials. Whether spin transport can be used to drive the antiferromagnetic order and how subsequent variations can be detected are some of the thrilling challenges currently being addressed. Antiferromagnetic spintronics started out with studies on spin transfer and has undergone a definite revival in the last few years with the publication of pioneering articles on the use of spin-orbit interactions in antiferromagnets. This paradigm shift offers possibilities for radically new concepts for spin manipulation in electronics. Central to these endeavors are the need for predictive models, relevant disruptive materials, and new experimental designs. This paper reviews the most prominent spintronic effects described based on theoretical and experimental analysis of antiferromagnetic materials. It also details some of the remaining bottlenecks and suggests possible avenues for future research. This review covers both spin-transfer-related effects, such as spin-transfer torque, spin penetration length, domain-wall motion, and "magnetization" dynamics, and spin-orbit related phenomena, such as (tunnel) anisotropic magnetoresistance, spin Hall, and inverse spin galvanic effects. Effects related to spin caloritronics, such as the spin Seebeck effect, are linked to the transport of magnons in antiferromagnets. The propagation of spin waves and spin superfluids in antiferromagnets is also covered.

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“…It has been predicted theoretically that spin-transfer torque (STT) can act on AFM, causing reorientation of its spin configuration, domain wall motion and stable oscillation or precession of the Neel vector [18][19][20][21] . Several follow-up experiments on exchange-biased spin-valves [22][23][24][25] have shown that current induced STT is able to affect the exchange bias at the FM/AFM interface, indirectly suggesting the presence of STT effect in AFM. More recently, spin pumping and spin torque ferromagnetic resonance (ST-FMR) measurements on FM/AFM/HM trilayers demonstrated that spin-current can travel across both NiO and IrMn at a reasonably large distance and high efficiency [26][27][28][29][30] .…”

Section: Introductionmentioning

confidence: 99%