Generation of Spin Currents in the Skyrmion Phase of a Helimagnetic Insulator $\mathrm{C}{\mathrm{u}}_2\mathrm{OSe}{\mathrm{O}}_3$

Abstract

We report spin-current generation related with skyrmion dynamics resonantly excited by a microwave in a helimagnetic insulator $\mathrm{C}{\mathrm{u}}_2\mathrm{OSe}{\mathrm{O}}_3$. A Pt layer was fabricated on $\mathrm{C}{\mathrm{u}}_2\mathrm{OSe}{\mathrm{O}}_3$ and voltage in the Pt layer was measured upon magnetic resonance of $\mathrm{C}{\mathrm{u}}_2\mathrm{OSe}{\mathrm{O}}_3$ 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 $\mathrm{C}{\mathrm{u}}_2\mathrm{OSe}{\mathrm{O}}_3$ as well as in the ferrimagnetic phase, which shows that magnetic skyrmions can contribute to the spin pumping effect.

15 pages, 5 figures

References in corpus (4)

• Direct electronic measurement of the spin Hall effect
• Long wavelength helimagnetic order and skyrmion lattice phase in Cu2OSeO3
• Robust formation of skyrmions and topological Hall effect in epitaxial thin films of MnSi
• Formation and rotation of skyrmion crystal in the chiral-lattice insulator Cu2OSeO3

Cited by in corpus (1)

• Spin Seebeck effect in a polar antiferromagnet $\alpha$-Cu${}_2$V${}_2$O${}_7$