Theory of spin Hall magnetoresistance

By Yan-ting Chen, S. Takahashi, H. Nakayama, M. Althammer, S. Goennenwein, Eiji Saitoh, G. Bauer. 2013

594 citations recorded by the source corpus.

We present a theory of the spin Hall magnetoresistance (SMR) in multilayers made from an insulating ferromagnet F, such as yttrium iron garnet (YIG), and a normal metal N with spin-orbit interactions, such as platinum (Pt). The SMR is induced by the simultaneous action of spin Hall and inverse spin Hall effects and therefore a nonequilibrium proximity phenomenon. We compute the SMR in F|N and F|N|F layered systems, treating N by spin-diffusion theory with quantum mechanical boundary conditions at the interfaces in terms of the spin-mixing conductance. Our results explain the experimentally observed spin Hall magnetoresistance in N|F bilayers. For F|N|F spin valves we predict an enhanced SMR amplitude when magnetizations are collinear. The SMR and the spin-transfer torques in these trilayers can be controlled by the magnetic configuration.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering

View Paper: https://www.semanticscholar.org/paper/51e24b24d240f04d5eb1c52aa8e8758acbc6f77f

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. Axel Hoffmann
2. A. Manchon
3. Can-Ming Hu
4. M. Harder
5. Pietro Gambardella
6. Y. Gui
7. Y. Tserkovnyak
8. A. Brataas

In Electrical and Electronic Engineering

1. A. Brataas
2. Axel Hoffmann
3. M. Harder
4. A. Manchon
5. Can-Ming Hu
6. Pietro Gambardella
7. Y. Tserkovnyak
8. Y. Gui

Citations in the corpus

• Antiferromagnetic spintronics (2016, background): “Several mechanisms have been identified to explain this behavior, such as interfacial Rashba spin-orbit coupling (Wang, Pauyac, and Manchon, 2014; Zhang, Vignale, and Zhang, 2015) and a spin Hall effect in the normal metal adjacent to the ferromagnet (Chen et al., 2013; Nakayama et al., 2013).”
• Giant orbital Hall effect and orbital-to-spin conversion in 3d, 5d, and 4f metallic heterostructures (2022, methodology): “Compared with the spin Hall magnetoresistance [35], such orbital Hall magnetoresistance may have a different dependence on the type of ferromagnet, its thickness, and the thickness of the nonmagnet.”
• Spin insulatronics (2020, background): “This term depends on the reactive part of the transverse conductance (the imaginary part of the "mixing conductance" [138]) [172] that governs the the magnetic proximity effect in the normal metal.”
• Electrical Detection of Magnetization Dynamics via Spin Rectification Effects (2016, background): “It has been found that SMR is enhanced in trilayer (FMI/NM/FMI) structures and it exhibits a different angular dependence from AMR [137].”
• Magnetization oscillations and waves driven by pure spin currents (2016, background): “This calculation also accounts for an additional correction factor, T , indicating how the charge current JC in the Pt layer effectively contributes [157,158] to the spin current JS = TΘSH JC converted by the spin Hall angle, ΘSH :”
• Spin Hall Effects in Metals (2013, background): “Furthermore, this spin Hall magnetoresistance can be distinguished from possible anisotropic magnetoresistance from induced magnetic order by their different orientational dependence; the spin Hall magnetoresistance is maximized for fields perpendicular to the polarization of the spin accumulation, ”