Interfacial Dzyaloshinskii-Moriya interaction, surface anisotropy energy, and spin pumping at spin orbit coupled Ir/Co interface

The interfacial Dzyaloshinskii-Moriya interaction (iDMI), surface anisotropy energy, and spin pumping at the Ir/Co interface are experimentally investigated by performing Brillouin light scattering. Contrary to previous reports, we suggest that the sign of the iDMI at the Ir/Co interface is the same...

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Veröffentlicht in:Applied physics letters 2016-04, Vol.108 (14)
Hauptverfasser: Kim, Nam-Hui, Jung, Jinyong, Cho, Jaehun, Han, Dong-Soo, Yin, Yuxiang, Kim, June-Seo, Swagten, Henk J. M., You, Chun-Yeol
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container_issue 14
container_start_page
container_title Applied physics letters
container_volume 108
creator Kim, Nam-Hui
Jung, Jinyong
Cho, Jaehun
Han, Dong-Soo
Yin, Yuxiang
Kim, June-Seo
Swagten, Henk J. M.
You, Chun-Yeol
description The interfacial Dzyaloshinskii-Moriya interaction (iDMI), surface anisotropy energy, and spin pumping at the Ir/Co interface are experimentally investigated by performing Brillouin light scattering. Contrary to previous reports, we suggest that the sign of the iDMI at the Ir/Co interface is the same as in the case of the Pt/Co interface. We also find that the magnitude of the iDMI energy density is relatively smaller than in the case of the Pt/Co interface, despite the large strong spin-orbit coupling (SOC) of Ir. The saturation magnetization and the perpendicular magnetic anisotropy (PMA) energy are significantly improved due to a strong SOC. Our findings suggest that an SOC in an Ir/Co system behaves in different ways for iDMI and PMA. Finally, we determine the spin pumping effect at the Ir/Co interface, and it increases the Gilbert damping constant from 0.012 to 0.024 for 1.5 nm-thick Co.
doi_str_mv 10.1063/1.4945685
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subjects ANISOTROPY
Applied physics
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
Cobalt
DAMPING
ENERGY DENSITY
Flux density
INTERACTIONS
INTERFACES
L-S COUPLING
LIGHT SCATTERING
Magnetic anisotropy
Magnetic saturation
MAGNETIZATION
PUMPING
SATURATION
SPIN
Spin-orbit interactions
SURFACES
VISIBLE RADIATION
title Interfacial Dzyaloshinskii-Moriya interaction, surface anisotropy energy, and spin pumping at spin orbit coupled Ir/Co interface
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