Spin pumping and probe in permalloy dots-topological insulator bilayers

H. C. Han, Y. S. Chen, M. D. Davydova, P. N. Petrov, P. N. Skirdkov, J. G. Lin, J. C. Wu, J. C.A. Huang, K. A. Zvezdin, A. K. Zvezdin

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present a ferromagnetic resonance (FMR) spin pumping experiment at room temperature in periodic arrays of permalloy nanodots of different radii deposited onto a 3D topological insulator Bi2Se3 film. We measure the dc voltage signal generated by spin-to-charge conversion of the pumped spin current due to the spin-orbit coupling in the bulk of Bi2Se3. In the nanostructured samples, two resonance peaks are observed, associated with Kittel and inhomogeneous edge modes, respectively. This more complex modal composition in comparison to continuous systems may provide additional advantages for development of prospective spintronic devices. We support our experimental results by theoretical calculations, which are based on micromagnetic modeling of the magnetization dynamics under FMR excitation in a nanodot. A numerical approach to the calculation of the spin-pumping voltage is proposed, and the efficiency of spin-to-charge conversion is estimated for two nanostructured samples with different dot sizes.

Original languageEnglish
Article number182411
JournalApplied Physics Letters
Volume111
Issue number18
DOIs
Publication statusPublished - 2017 Oct 30

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Permalloys (trademark)
pumping
insulators
probes
ferromagnetic resonance
electric potential
orbits
magnetization
radii
room temperature
excitation

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

Cite this

Han, H. C., Chen, Y. S., Davydova, M. D., Petrov, P. N., Skirdkov, P. N., Lin, J. G., ... Zvezdin, A. K. (2017). Spin pumping and probe in permalloy dots-topological insulator bilayers. Applied Physics Letters, 111(18), [182411]. https://doi.org/10.1063/1.5004097
Han, H. C. ; Chen, Y. S. ; Davydova, M. D. ; Petrov, P. N. ; Skirdkov, P. N. ; Lin, J. G. ; Wu, J. C. ; Huang, J. C.A. ; Zvezdin, K. A. ; Zvezdin, A. K. / Spin pumping and probe in permalloy dots-topological insulator bilayers. In: Applied Physics Letters. 2017 ; Vol. 111, No. 18.
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Han, HC, Chen, YS, Davydova, MD, Petrov, PN, Skirdkov, PN, Lin, JG, Wu, JC, Huang, JCA, Zvezdin, KA & Zvezdin, AK 2017, 'Spin pumping and probe in permalloy dots-topological insulator bilayers', Applied Physics Letters, vol. 111, no. 18, 182411. https://doi.org/10.1063/1.5004097

Spin pumping and probe in permalloy dots-topological insulator bilayers. / Han, H. C.; Chen, Y. S.; Davydova, M. D.; Petrov, P. N.; Skirdkov, P. N.; Lin, J. G.; Wu, J. C.; Huang, J. C.A.; Zvezdin, K. A.; Zvezdin, A. K.

In: Applied Physics Letters, Vol. 111, No. 18, 182411, 30.10.2017.

Research output: Contribution to journalArticle

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AU - Han, H. C.

AU - Chen, Y. S.

AU - Davydova, M. D.

AU - Petrov, P. N.

AU - Skirdkov, P. N.

AU - Lin, J. G.

AU - Wu, J. C.

AU - Huang, J. C.A.

AU - Zvezdin, K. A.

AU - Zvezdin, A. K.

PY - 2017/10/30

Y1 - 2017/10/30

N2 - We present a ferromagnetic resonance (FMR) spin pumping experiment at room temperature in periodic arrays of permalloy nanodots of different radii deposited onto a 3D topological insulator Bi2Se3 film. We measure the dc voltage signal generated by spin-to-charge conversion of the pumped spin current due to the spin-orbit coupling in the bulk of Bi2Se3. In the nanostructured samples, two resonance peaks are observed, associated with Kittel and inhomogeneous edge modes, respectively. This more complex modal composition in comparison to continuous systems may provide additional advantages for development of prospective spintronic devices. We support our experimental results by theoretical calculations, which are based on micromagnetic modeling of the magnetization dynamics under FMR excitation in a nanodot. A numerical approach to the calculation of the spin-pumping voltage is proposed, and the efficiency of spin-to-charge conversion is estimated for two nanostructured samples with different dot sizes.

AB - We present a ferromagnetic resonance (FMR) spin pumping experiment at room temperature in periodic arrays of permalloy nanodots of different radii deposited onto a 3D topological insulator Bi2Se3 film. We measure the dc voltage signal generated by spin-to-charge conversion of the pumped spin current due to the spin-orbit coupling in the bulk of Bi2Se3. In the nanostructured samples, two resonance peaks are observed, associated with Kittel and inhomogeneous edge modes, respectively. This more complex modal composition in comparison to continuous systems may provide additional advantages for development of prospective spintronic devices. We support our experimental results by theoretical calculations, which are based on micromagnetic modeling of the magnetization dynamics under FMR excitation in a nanodot. A numerical approach to the calculation of the spin-pumping voltage is proposed, and the efficiency of spin-to-charge conversion is estimated for two nanostructured samples with different dot sizes.

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Han HC, Chen YS, Davydova MD, Petrov PN, Skirdkov PN, Lin JG et al. Spin pumping and probe in permalloy dots-topological insulator bilayers. Applied Physics Letters. 2017 Oct 30;111(18). 182411. https://doi.org/10.1063/1.5004097