Effect of NiO inserted layer on spin-Hall magnetoresistance in Pt/NiO/YIG heterostructures

Shang, T.; Zhan, Qingfeng; Yang, Haolin; Zuo, Zhiwei; Xie, Yurong; Liu, L. P.; Zhang, S. L.; Zhang, Y.; Li, H. H.; Wang, Baomin; Wu, Yihong; Zhang, S.; Li, Run Wei

doi:10.1063/1.4959573

Cited by 58 publications

(26 citation statements)

References 38 publications

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“…Since the effect is unaffected by magnetization reversal it would appear natural to observe it in antiferromagnetic multilayers (Manchon, 2017b). Indeed, it has been reported for several antiferromagnets: metallic IrMn in YIG/IrMn stacks , insulating SrMnO 3 in SrMnO 3 =Pt stacks , and insulating NiO in Pt/NiO/YIG trilayers (Shang et al, 2016;Hou et al, 2017;Hung et al, 2017;Lin and Chien, 2017).…”

Section: Spin Hall Magnetoresistancementioning

confidence: 94%

“…This effect was linked to enhanced spin Hall magnetoresistance at the magnetic phase transition of NiO (Hou et al, 2017;Lin and Chien, 2017). An unconventional negative signal was also detected (Shang et al, 2016;Hou et al, 2017;Lin and Chien, 2017). Hou et al (2017) suggested that this negative signal is due to spin-flop coupling (90°exchange coupling) between the NiO and YIG magnetic orders, whereas Lin and Chien (2017) linked the effect to spin-flip reflection from the NiO antiferromagnet exchange coupled with the YIG layer.…”

Section: Spin Hall Magnetoresistancementioning

confidence: 98%

“…With regard to insulating antiferromagnets, several teams (Shang et al, 2016;Hou et al, 2017;Hung et al, 2017;Lin and Chien, 2017) studied Pt/NiO/YIG trilayers. NiO was demonstrated to not only convey the spin information through spin waves to the YIG (see Table V) but to be the source of the magnetoresistive signal (Hou et al, 2017).…”

Section: Spin Hall Magnetoresistancementioning

confidence: 99%

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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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Section: Spin Hall Magnetoresistancementioning

confidence: 94%

Section: Spin Hall Magnetoresistancementioning

confidence: 98%

Section: Spin Hall Magnetoresistancementioning

confidence: 99%

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Antiferromagnetic spintronics

et al. 2018

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“…The presence of thin layers of electrically insulating NiO is certain to affect charge and spin transport between the Ni and Pt particles. However, as NiO is antiferromagnetic, spin currents can still propagate through thin layers of this material; this has been demonstrated in several recent studies, one of which observed spin currents transmitted through NiO layers up to 100 nm thick in Y 3 Fe 5 O 12 /NiO/Pt heterostructures, as well as multiple studies that suggest the addition of NiO actually enhances the transmission of spin currents under certain conditions12272829. The presence of NiO undoubtedly has a detrimental effect on the electrical resistivity and power factor of both the reference and composite materials, although we anticipate these effects may be partially negated by a corresponding decrease in thermal conductivity.…”

Section: Resultsmentioning

confidence: 90%

Observation of spin Seebeck contribution to the transverse thermopower in Ni-Pt and MnBi-Au bulk nanocomposites

et al. 2016

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Transverse thermoelectric devices produce electric fields perpendicular to an incident heat flux. Classically, this process is driven by the Nernst effect in bulk solids, wherein a magnetic field generates a Lorentz force on thermally excited electrons. The spin Seebeck effect also produces magnetization-dependent transverse electric fields. It is traditionally observed in thin metallic films deposited on electrically insulating ferromagnets, but the films' high resistance limits thermoelectric conversion efficiency. Combining Nernst and spin Seebeck effect in bulk materials would enable devices with simultaneously large transverse thermopower and low electrical resistance. Here we demonstrate experimentally that this is possible in composites of conducting ferromagnets (Ni or MnBi) containing metallic nanoparticles with strong spin–orbit interactions (Pt or Au). These materials display positive shifts in transverse thermopower attributable to inverse spin Hall electric fields in the nanoparticles. This more than doubles the power output of the Ni-Pt materials, establishing proof of principle that the spin Seebeck effect persists in bulk nanocomposites.

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“…These features allow one to use the SMR as a convenient means to extract the magnitude of spin Hall angle of the HM layer: the spin Hall angle obtained through SMR seem to agree with that estimated by other methods 9 . Recently, studies on SMR related effects have been increasing 10 ; an unidirectional component of the SMR is found in HM/FM bilayers 11 , SMR has been observed in systems with antiferromagnets [12][13][14][15] , the observation of the spin Nernst effect is based on the SMR theory [16][17][18] and the SMR analogue of the Rashba-Edelstein effect 19,20 has been found in Bi based structures 21 .…”

mentioning

confidence: 99%

Anomalous spin Hall magnetoresistance in Pt/Co bilayers

Kawaguchi

Towa

Lau

et al. 2018

Applied Physics Letters

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We have studied the spin Hall magnetoresistance (SMR), the magnetoresistance within the plane transverse to the current flow, of Pt/Co bilayers. We find that the SMR increases with increasing Co thickness: the effective spin Hall angle for bilayers with thick Co exceeds the reported values of Pt when a conventional drift-diffusion model is used. An extended model including spin transport within the Co layer cannot account for the large SMR. To identify its origin, contributions from other sources are studied. For most bilayers, the SMR increases with decreasing temperature and increasing magnetic field, indicating that magnon-related effects in the Co layer play little role. Without the Pt layer, we do not observe the large SMR found for the Pt/Co bilayers with thick Co. Implementing the effect of the so-called interface magnetoresistance and the textured induced anisotropic scattering cannot account for the Co thickness dependent SMR. Since the large SMR is present for W/Co but its magnitude reduces in W/CoFeB, we infer its origin is associated with a particular property of Co. *

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Effect of NiO inserted layer on spin-Hall magnetoresistance in Pt/NiO/YIG heterostructures

Abstract: Articles you may be interested in

Cited by 58 publications

References 38 publications

Antiferromagnetic spintronics

Antiferromagnetic spintronics

Observation of spin Seebeck contribution to the transverse thermopower in Ni-Pt and MnBi-Au bulk nanocomposites

Anomalous spin Hall magnetoresistance in Pt/Co bilayers

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