Inverse spin-Hall effect voltage generation by nonlinear spin-wave excitation

Feiler, Laura; Sentker, Kathrin; Brinker, Manuel; Kuhlmann, Nils; Stein, Falk-Ulrich; Meier, Guido

doi:10.1103/PhysRevB.93.064408

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Inverse spin-Hall effect voltage generation by nonlinear spin-wave excitation

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Stein, Falk-Ulrich
Quantum Condensed Matter Dynamics, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;

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Meier, Guido
Dynamics and Transport in Nanostructures, Condensed Matter Dynamics Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Ultrafast Electronics, Scientific Service Units, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science (CFEL), Luruper Chaussee 149, 22761 Hamburg, Germany;

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http://dx.doi.org/10.1103/PhysRevB.93.064408
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PhysRevB.93.064408.pdf
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引用

Feiler, L., Sentker, K., Brinker, M., Kuhlmann, N., Stein, F.-U., & Meier, G. (2016). Inverse spin-Hall effect voltage generation by nonlinear spin-wave excitation. Physical Review B, 93(6):. doi:10.1103/PhysRevB.93.064408.

引用: https://hdl.handle.net/11858/00-001M-0000-0029-A70D-5

要旨

We investigate spin currents in microstructured permalloy/platinum bilayers that are excited via magnetic high-frequency fields. Due to this excitation spin pumping occurs at the permalloy/platinum interface and a spin current is injected into the platinum layer. The spin current is detected as a voltage via the inverse spin-Hall effect. We find two regimes reflected by a nonlinear, abrupt voltage surge, which is reproducibly observed at distinct excitation field strengths. Micromagnetic simulations suggest that the surge is caused by excitation of a spin-wave-like mode. The comparatively large voltages reveal a highly efficient spin-current generation method in a mesoscopic spintronic device.