Spin-Swapping Transport and Torques in Ultrathin Magnetic Bilayers

Saidaoui, Hamed Ben Mohamed; Manchon, Aurélien

doi:10.1103/physrevlett.117.036601

Cited by 57 publications

(48 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The magneto-optic Kerr effect (MOKE) allows for detecting the in-plane and out-of-plane components of the magnetization through the rotation of the light polarization upon reflection from a magnetic surface (Qiu and Bader, 2000). MOKE microscopy, with a wavelengthlimited resolution of about 1 µm, has been used extensively to characterize SOT-induced domain nucleation and displacement (Emori et al, 2013;Miron et al, 2010;Ryu et al, 2013;Safeer et al, 2016) as well as the currentinduced spin accumulation in bare Pt and W layers (Stamm et al, 2017). MOKE-based detection schemes have been used also to estimate the SOT amplitude by measuring the oscillations of the magnetization induced by an ac current in thin metal bilayers (Fan et al, 2014a).…”

Section: Magneto-optic Kerr Effectmentioning

confidence: 99%

Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems

et al. 2019

Self Cite

View full text Add to dashboard Cite

Section: Magneto-optic Kerr Effectmentioning

confidence: 99%

Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems

et al. 2019

Self Cite

View full text Add to dashboard Cite

“…Two main effects are usually considered to be at the origin of the SOT: the spin Hall effect (SHE) taking place in the bulk of the substrate induces (mostly) a damping-like torque [24][25][26] while the inverse spin galvanic effect (ISGEalso called Rashba-Edelstein effect 27,28 ) present at the interface produces (mostly) a field-like torque [3][4][5][6]29 . However, several experimental [30][31][32][33][34] and theoretical 35 clues indicate that the debate is not settled yet and additional mechanisms, such as intrinsic magnetoelectric effect [36][37][38] and spin swapping 39,40 , have been suggested to take place in ultrathin magnetic multilayers.…”

Section: Introductionmentioning

confidence: 99%

Spin-orbit torque in a three-dimensional topological insulator–ferromagnet heterostructure: Crossover between bulk and surface transport

Ghosh

Manchon

2018

Phys. Rev. B

Self Cite

View full text Add to dashboard Cite

Current-driven spin-orbit torques are investigated in a heterostructure composed of a ferromagnet deposited on top of a three dimensional topological insulator using the linear response formalism. We develop a tight-binding model of the heterostructure adopting a minimal interfacial hybridization scheme that promotes induced magnetic exchange on the topological surface states, as well as induced Rashba-like spin-orbit coupling in the ferromagnet. Therefore, our model accounts for spin Hall effect from bulk states together with inverse spin galvanic and magnetoelectric effects at the interface on equal footing. By varying the transport energy across the band structure, we uncover a crossover from surface-dominated to bulk-dominated transport regimes. We show that the spin density profile and the nature of the spin-orbit torques differ substantially in both regimes. Our results, which compare favorably with experimental observations, demonstrate that the large damping-like torque reported recently is more likely attributed to the Berry curvature of interfacial states, while spin Hall torque remains small even in the bulk-dominated regime. arXiv:1711.11016v2 [cond-mat.mes-hall]

show abstract

“…the interface transparency. We attribute the exceptionally large to the significant imaginary part of the interfacial spin mixing conductance, which may include contribution from Rashba-like effects 33,34 .…”

mentioning

confidence: 97%

Spin Hall effect from hybridized 3d−4p orbitals

Lau

Lee

et al. 2019

Phys. Rev. B

View full text Add to dashboard Cite

† These authors contributed equally to this work Electrical manipulation of magnetization by spin-orbit torque (SOT) 1-6 has shown promise for realizing reliable magnetic memories and oscillators. To date, the generation of transverse spin current and SOT, whether it is of spin Hall effect (SHE) 2,7 , Rashba-Edelstein effect 8 or spinmomentum locking origin 3,9 , relies primarily on materials or heterostructures containing 5d or 6p heavy elements with strong spin-orbit coupling. Here we show that a paramagnetic CoGa compound possesses large enough spin Hall angle to allow robust SOT switching of perpendicularly-magnetized ferrimagnetic MnGa films in CoGa/MnGa/Oxide heterostructures.The spin Hall efficiency estimated via spin Hall magnetoresistance and harmonic Hall measurements is +0.05±0.01, which is surprisingly large for a system that does not contain any heavy metal element. First-principles calculations corroborate our experimental observations and suggest that the hybridized Co 3d -Ga 4p orbitals along R-X in the Brillouin zone is responsible for the intrinsic SHE. Our results suggest that efficient spin current generation can be realized in intermetallic by alloying a transition metal with a p-orbital element and by Fermi level tuning. * yongchang.

show abstract

Spin-Swapping Transport and Torques in Ultrathin Magnetic Bilayers

Cited by 57 publications

References 49 publications

Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems

Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems

Spin-orbit torque in a three-dimensional topological insulator–ferromagnet heterostructure: Crossover between bulk and surface transport

Spin Hall effect from hybridized 3d−4p orbitals

Contact Info

Product

Resources

About