Spin Hall Effects in Metallic Antiferromagnets

Zhang, Wei; Jungfleisch, M. Benjamin; Jiang, Wanjun; Pearson, John; Hoffmann, A.; Freimuth, Frank; Mokrousov, Yuriy

doi:10.1103/physrevlett.113.196602

Cited by 353 publications

(327 citation statements)

References 46 publications

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“…7(c), we show that the enhancement of the spin-angular momentum transfer through the interface is indeed due to the interfacial exchange coupling, as α is proportional to the square of the exchange bias. This dependence also suggest that one of the main damping mechanisms in our samples is the two-magnon scattering at the FM/AFM interface, in agreement with the previous studies [19,41,42]. The exact mechanism of the enhancement of h z is of complex origin due to the strong spin-orbit coupling in the system and the interface magnetic coupling.…”

Section: Discussionsupporting

confidence: 92%

“…using values λ SD = 0.7 nm [19] and conductivity σ IrMn = 1/ρ IrMn , we obtain negative values for G mix , which is nonphysical. Here, α 0 = 0.006 is the Gilbert damping of bulk NiFe.…”

Section: Discussionmentioning

confidence: 82%

“…3(a), because IrMn has a spin diffusion length smaller than 1 nm [19,34]. It is clearly associated with the exchange-coupled NiFe/IrMn interface.…”

Section: Origins Of the Effectmentioning

confidence: 99%

“…† ajf1006@cam.ac.uk that a metallic AFM itself (e.g., IrMn) can act as an efficient ISHE detector of the spin current injected from the FM, with comparable spin-Hall angles to heavy NMs [18,19]. Our work makes the next step beyond previous studies of transmission and detection of spin currents in AFMs by focusing on spin manipulation by AFMs.…”

Section: Introductionmentioning

confidence: 96%

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Electrical manipulation of ferromagnetic NiFe by antiferromagnetic IrMn

et al. 2015

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We demonstrate that an antiferromagnet can be employed for a highly efficient electrical manipulation of a ferromagnet. In our study, we use an electrical detection technique of the ferromagnetic resonance driven by an in-plane ac current in a NiFe/IrMn bilayer. At room temperature, we observe antidampinglike spin torque acting on the NiFe ferromagnet, generated by an in-plane current driven through the IrMn antiferromagnet. A large enhancement of the torque, characterized by an effective spin-Hall angle exceeding most heavy transition metals, correlates with the presence of the exchange-bias field at the NiFe/IrMn interface. It highlights that, in addition to the strong spin-orbit coupling, the antiferromagnetic order in IrMn governs the observed phenomenon.

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Section: Discussionsupporting

confidence: 92%

“…using values λ SD = 0.7 nm [19] and conductivity σ IrMn = 1/ρ IrMn , we obtain negative values for G mix , which is nonphysical. Here, α 0 = 0.006 is the Gilbert damping of bulk NiFe.…”

Section: Discussionmentioning

confidence: 82%

“…3(a), because IrMn has a spin diffusion length smaller than 1 nm [19,34]. It is clearly associated with the exchange-coupled NiFe/IrMn interface.…”

Section: Origins Of the Effectmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 96%

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Electrical manipulation of ferromagnetic NiFe by antiferromagnetic IrMn

et al. 2015

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“…In the spirit of searching for new materials along these lines, we demonstrated that the inverse spin Hall effect exists in metallic antiferromagnets (AFs) through the direct dc detection of a spin pumping process from an adjacent Py layer. 27 Our work strongly corroborated a previous measurement of the inverse spin Hall effect in IrMn 28 by extending it to a wide variety of CuAu-I-type antiferromagnetic alloys, such as PtMn, which consists of both heavy-metal elements (Pt) and an atomic-level, staggered magnetization (Mn).…”

Section: Antiferromagnets: Materials Of Interestsupporting

confidence: 85%

Spin Hall effects in metallic antiferromagnets – perspectives for future spin-orbitronics

et al. 2016

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We investigate angular dependent spin-orbit torques from the spin Hall effect in a metallic antiferromagnet using the spin-torque ferromagnetic resonance technique. The large spin Hall effect exists in PtMn, a prototypical CuAu-I-type metallic antiferromagnet. By applying epitaxial growth, we previously reported an appreciable difference in spin-orbit torques for c- and a-axis orientated samples, implying anisotropic effects in magnetically ordered materials. In this work we demonstrate through bipolar-magnetic-field experiments a small but noticeable asymmetric behavior in the spin-transfer-torque that appears as a hysteresis effect. We also suggest that metallic antiferromagnets may be good candidates for the investigation of various unidirectional effects related to novel spin-orbitronics phenomena.

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Antiferromagnetic Materials and Their Manipulations

Liu

Wang

2022

Spintronics

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Spin Hall Effects in Metallic Antiferromagnets

Cited by 353 publications

References 46 publications

Electrical manipulation of ferromagnetic NiFe by antiferromagnetic IrMn

Electrical manipulation of ferromagnetic NiFe by antiferromagnetic IrMn

Spin Hall effects in metallic antiferromagnets – perspectives for future spin-orbitronics

Antiferromagnetic Materials and Their Manipulations

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