Spin transport through the metallic antiferromagnet FeMn

Sağlam, Hilal; Zhang, W.; Jungfleisch, M. Benjamin; Sklenar, Joseph; Pearson, John; Ketterson, J. B.; Hoffmann, A.

doi:10.1103/physrevb.94.140412

Cited by 42 publications

(38 citation statements)

References 47 publications

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“…As a consequence,  p reaches a maximum near the paramagnetic-to-antiferromagnetic phase transition of the IrMn layer, which we measured at T = 55 K ( Fig. 3(a) This effect may be the consequence of deeper penetration of the spin current carried by magnons compared to that flowing via conduction electrons [27,28]. In Fig.…”

mentioning

confidence: 85%

Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states

Gladii¹,

Frangou²,

Forestier³

et al. 2019

Appl. Phys. Express

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We investigated spin injection by spin pumping from a spin-injector(NiFe) into a spin-sink to detect spin fluctuations in the spin-sink. By scanning the ordering-temperature of several magnetic transitions, we found that enhanced spin pumping due to spin fluctuations applies with several ordering states: ferromagnetic(Tb) and antiferromagnetic(NiO, NiFeOx, BiFeO3, exchange-biased and unbiased IrMn). Results also represent systematic experimental investigation supporting that the effect is independent of the metallic and insulating nature of the spin-sink, and is observed whether the spin current probe involves electronic or magnonic transport, facilitating advances in material characterization and engineering for spintronic applications.

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mentioning

confidence: 85%

Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states

Gladii¹,

Frangou²,

Forestier³

et al. 2019

Appl. Phys. Express

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“…Note that the initial amplitude of the spin-angular momentum transfer contribution mediated by magnons through ferromagnetic/ antiferromagnetic metallic interfaces is directly related to the interfacial exchange-coupling amplitude, as demonstrated by Tshitoyan et al (2015). Using spin pumping and measuring the inverse spin Hall effect in NiFe/FeMn/W trilayers, Saglam et al (2016) managed to disentangle electronic-and magnonic-transport-related penetration lengths in FeMn (see also Table V). They took advantage of the relatively large magnitude and opposite sign of spin Hall effects in W compared to FeMn to detect when magnonic transport takes over, i.e., when spin currents reach the W layer for FeMn thickness well above the electronic spin-diffusion length.…”

Section: Spin Penetration Depths and Relaxation Mechanismsmentioning

confidence: 97%

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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“…In ferromagnet/antiferromagnet/nonmagnet trilayers, a spin-current was pumped from the ferromagnet and detected by the inverse spin Hall effect in the nonmagnetic layer. Fluctuations of the antiferromagnetic order provide an efficient pathway for spin current transmission [Saglam et al ., 2016]. Robust spin-transport through the antiferromagnet (insulating NiO) was ascribed to antiferromagnetic moment fluctuations [Wang et al ., 2014; Hahn et al ., 2014; Lin et al ., 2016; Zink et al ., 2016], but uncompensated spins in the antiferromagnet due to defects, grain boundaries, and interfacial roughness may also play a role.…”

Section: Spin Transport At and Through Interfacesmentioning

confidence: 99%

Interface-induced phenomena in magnetism

et al. 2017

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This article reviews static and dynamic interfacial effects in magnetism, focusing on interfacially-driven magnetic effects and phenomena associated with spin-orbit coupling and intrinsic symmetry breaking at interfaces. It provides a historical background and literature survey, but focuses on recent progress, identifying the most exciting new scientific results and pointing to promising future research directions. It starts with an introduction and overview of how basic magnetic properties are affected by interfaces, then turns to a discussion of charge and spin transport through and near interfaces and how these can be used to control the properties of the magnetic layer. Important concepts include spin accumulation, spin currents, spin transfer torque, and spin pumping. An overview is provided to the current state of knowledge and existing review literature on interfacial effects such as exchange bias, exchange spring magnets, spin Hall effect, oxide heterostructures, and topological insulators. The article highlights recent discoveries of interface-induced magnetism and non-collinear spin textures, non-linear dynamics including spin torque transfer and magnetization reversal induced by interfaces, and interfacial effects in ultrafast magnetization processes.

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Spin transport through the metallic antiferromagnet FeMn

Cited by 42 publications

References 47 publications

Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states

Spin pumping as a generic probe for linear spin fluctuations: demonstration with ferromagnetic and antiferromagnetic orders, metallic and insulating electrical states

Antiferromagnetic spintronics

Interface-induced phenomena in magnetism

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