Anomalous Hall effect in the noncollinear antiferromagnet Mn5Si3

Sürgers, Christoph; Kittler, W.; Wolf, Thomas; Loehneysen, H. v.

doi:10.1063/1.4943759

Cited by 42 publications

(44 citation statements)

References 37 publications

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“…(The behaviour of ρ yx with the field oriented along the b axis has been reported previously18. Figure 2a shows that for the field direction , the Hall effect decreases with increasing temperature and vanishes above T N 1 ≈ 60 K. While ρ yx at 25 K has two remanent states at ±4 μΩcm at zero field, the magnetization shows only a weak difference of M (0) = ±0.03 μ B /f.u.…”

Section: Resultssupporting

confidence: 69%

Switching of a large anomalous Hall effect between metamagnetic phases of a non-collinear antiferromagnet

Sürgers

Wolf

Adelmann

et al. 2017

Sci Rep

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The anomalous Hall effect (AHE), which in long-range ordered ferromagnets appears as a voltage transverse to the current and usually is proportional to the magnetization, often is believed to be of negligible size in antiferromagnets due to their low uniform magnetization. However, recent experiments and theory have demonstrated that certain antiferromagnets with a non-collinear arrangement of magnetic moments exhibit a sizeable spontaneous AHE at zero field due to a non-vanishing Berry curvature arising from the quantum mechanical phase of the electron’s wave functions. Here we show that antiferromagnetic Mn5Si3 single crystals exibit a large AHE which is strongly anisotropic and shows multiple transitions with sign changes at different magnetic fields due to field-induced rearrangements of the magnetic structure despite only tiny variations of the total magnetization. The presence of multiple non-collinear magnetic phases offers the unique possiblity to explore the details of the AHE and the sensitivity of the Hall effect on the details of the magnetic texture.

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Section: Resultssupporting

confidence: 69%

Switching of a large anomalous Hall effect between metamagnetic phases of a non-collinear antiferromagnet

Sürgers

Wolf

Adelmann

et al. 2017

Sci Rep

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“…This large anomalous Hall effect was recently experimentally confirmed in certain noncollinear antiferromagnets such as Mn 5 Si 3 (Sürgers et al, 2014(Sürgers et al, , 2016) (see Fig. 33), Mn 3 Sn (Nakatsuji, Kiyohara, and Higo, 2015), Mn 3 Ge (Nayak et al, 2016), and GdPtBi (Suzuki et al, 2016) single crystals.…”

Section: A Anisotropic Magnetoresistancementioning

confidence: 90%

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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“…There are two possible reasons for this phenomenon, one is that the AHE and SHE attributed to non-collinear magnetism is generated on a length scale of nanometer and is a local property not relying on long range magnetic order, i.e., regardless of how IrMn grains are orientated, as reported previously in Mn 5 Si 3 film. 38 The second one is that the strength of SOC is independent of AFM order in IrMn metal, which is mainly determined by the Ir atoms.…”

Section: Discussionmentioning

confidence: 99%

Effect of IrMn inserted layer on anomalous-Hall resistance and spin-Hall magnetoresistance in Pt/IrMn/YIG heterostructures

Shang

Yang

Zhan

et al. 2016

Journal of Applied Physics

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We report an investigation of temperature and IrMn layered thickness dependence of anomalous-Hall resistance (AHR), anisotropic magnetoresistance (AMR), and magnetization on Pt/Ir 20 Mn 80 /Y 3 Fe 5 O 12 (Pt/IrMn/YIG) heterostructures. The magnitude of AHR is dramatically enhanced compared with Pt/YIG bilayers. The enhancement is much more profound at higher temperatures and peaks at the IrMn thickness of 3 nm. The observed spin-Hall magnetoresistance (SMR) in the temperature range of 10-300 K indicates that the spin current generated in the Pt layer can penetrate the entire thickness of the IrMn layer to interact with the YIG layer. The lack of conventional anisotropic magnetoresistance (CAMR) implies that the insertion of the IrMn layer between Pt and YIG efficiently suppresses the magnetic proximity effect (MPE) on induced Pt moments by YIG. Our results suggest that the dual roles of the IrMn insertion in Pt/IrMn/YIG heterostructures are to block the MPE and to transport the spin current between Pt and YIG layers. We discuss possible mechanisms for the enhanced AHR.

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Anomalous Hall effect in the noncollinear antiferromagnet Mn5Si3

Cited by 42 publications

References 37 publications

Switching of a large anomalous Hall effect between metamagnetic phases of a non-collinear antiferromagnet

Switching of a large anomalous Hall effect between metamagnetic phases of a non-collinear antiferromagnet

Antiferromagnetic spintronics

Effect of IrMn inserted layer on anomalous-Hall resistance and spin-Hall magnetoresistance in Pt/IrMn/YIG heterostructures

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