Spin-current emission governed by nonlinear spin dynamics

Takaharu Tashiro, Saki Matsuura, Akiyo Nomura, Shun Watanabe, Keehoon Kang, Henning Sirringhaus, Kazuya Ando

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Coupling between conduction electrons and localized magnetization is responsible for a variety of phenomena in spintronic devices. This coupling enables to generate spin currents from dynamical magnetization. Due to the nonlinearity of magnetization dynamics, the spin-current emission through the dynamical spin-exchange coupling offers a route for nonlinear generation of spin currents. Here, we demonstrate spin-current emission governed by nonlinear magnetization dynamics in a metal/magnetic insulator bilayer. The spin-current emission from the magnetic insulator is probed by the inverse spin Hall effect, which demonstrates nontrivial temperature and excitation power dependences of the voltage generation. The experimental results reveal that nonlinear magnetization dynamics and enhanced spin-current emission due to magnon scatterings are triggered by decreasing temperature. This result illustrates the crucial role of the nonlinear magnon interactions in the spin-current emission driven by dynamical magnetization, or nonequilibrium magnons, from magnetic insulators.

Original languageEnglish
Article number15158
JournalScientific Reports
Volume5
DOIs
Publication statusPublished - 2015 Oct 16

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spin dynamics
magnetization
insulators
magnetic metals
spin exchange
conduction electrons
magnons
Hall effect
nonlinearity
routes
temperature
electric potential
scattering
excitation

ASJC Scopus subject areas

  • General

Cite this

Tashiro, T., Matsuura, S., Nomura, A., Watanabe, S., Kang, K., Sirringhaus, H., & Ando, K. (2015). Spin-current emission governed by nonlinear spin dynamics. Scientific Reports, 5, [15158]. https://doi.org/10.1038/srep15158

Spin-current emission governed by nonlinear spin dynamics. / Tashiro, Takaharu; Matsuura, Saki; Nomura, Akiyo; Watanabe, Shun; Kang, Keehoon; Sirringhaus, Henning; Ando, Kazuya.

In: Scientific Reports, Vol. 5, 15158, 16.10.2015.

Research output: Contribution to journalArticle

Tashiro, T, Matsuura, S, Nomura, A, Watanabe, S, Kang, K, Sirringhaus, H & Ando, K 2015, 'Spin-current emission governed by nonlinear spin dynamics', Scientific Reports, vol. 5, 15158. https://doi.org/10.1038/srep15158
Tashiro T, Matsuura S, Nomura A, Watanabe S, Kang K, Sirringhaus H et al. Spin-current emission governed by nonlinear spin dynamics. Scientific Reports. 2015 Oct 16;5. 15158. https://doi.org/10.1038/srep15158
Tashiro, Takaharu ; Matsuura, Saki ; Nomura, Akiyo ; Watanabe, Shun ; Kang, Keehoon ; Sirringhaus, Henning ; Ando, Kazuya. / Spin-current emission governed by nonlinear spin dynamics. In: Scientific Reports. 2015 ; Vol. 5.
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AU - Ando, Kazuya

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