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arXiv · 1502.00742

Generation of Spin Currents in the Skyrmion Phase of a Helimagnetic Insulator $\mathrm{Cu_2OSeO_3}$

Daichi Hirobe·Yuki Shiomi·Yuhki Shimada·Jun-ichiro Ohe·Eiji Saitoh
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Abstract

We report spin-current generation related with skyrmion dynamics resonantly excited by a microwave in a helimagnetic insulator $\mathrm{Cu_2OSeO_3}$. A Pt layer was fabricated on $\mathrm{Cu_2OSeO_3}$ and voltage in the Pt layer was measured upon magnetic resonance of $\mathrm{Cu_2OSeO_3}$ to electrically detect injected spin currents via the inverse spin Hall effect (ISHE) in Pt. We found that ISHE-induced electromotive forces appear in the skyrmion phase of $\mathrm{Cu_2OSeO_3}$ as well as in the ferrimagnetic phase, which shows that magnetic skyrmions can contribute to the spin pumping effect.

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Daichi Hirobe, Yuki Shiomi, Yuhki Shimada, Jun-ichiro Ohe, Eiji Saitoh. 2015-02-03. Generation of Spin Currents in the Skyrmion Phase of a Helimagnetic Insulator $\mathrm{Cu_2OSeO_3}$. https://doi.org/10.1063/1.4907040

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