Free-layer-thickness-dependence of the Spin Galvanic Effect with Spin Rotation Symmetry
Physics and Astronomy
Spintronics, Ferromagnetic materials, Spin valves, Spin-orbit interactions, Nanomagnets, Spin Hall effect, Thermoelectricity
Spin-orbit coupling near the surface of a ferromagnetic metal gives rises to spin-to-charge conversion with symmetry different from the conventional inverse spin Hall effect. We have previously observed this spin galvanic effect with spin rotation symmetry (SGE-SR) in a spin valve under a temperature gradient. Here, we show there are two processes that contribute to the SGE-SR, one of which is sensitive to the free magnetic layer thickness, while the other only depends on the interface of the free layer. Based on the free-layer-thickness-dependent study, we extrapolate the spin diffusion length of Py to be 3.9 ± 0.2 nm. We also propose that the SGE-SR can help to quantitatively study the spin Seebeck effect in metallic magnetic films.
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Aljuaid, Wafa S, et al. “Free-Layer-Thickness-Dependence of the Spin Galvanic Effect with Spin Rotation Symmetry.” Applied Physics Letters, vol. 113, no. 12, 2018, p. 122401. doi: 10.1063/1.5048012