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

Title
Interfacial Dzyaloshinskii-Moriya interaction, surface anisotropy energy, and spin pumping at spin orbit coupled Ir/Co interface
Authors
Kim, NH[Kim, Nam-Hui]Jung, J[Jung, Jinyong]Cho, J[Cho, Jaehun]Han, DS[Han, Dong-Soo]Yin, YX[Yin, Yuxiang]Kim, JS[Kim, June-Seo]Swagten, HJM[Swagten, Henk J. M.]You, CY[You, Chun-Yeol]
DGIST Authors
You, CY[You, Chun-Yeol]
Issue Date
2016-04-04
Citation
Applied Physics Letters, 108(14)
Type
Article
Article Type
Article
Keywords
AnisotropyBrillouin Light ScatteringBrillouin ScatteringDzyaloshinskii-Moriya InteractionEnergy DensityGilbert Damping ConstantIridiumLight ScatteringMagnetic AnisotropyPerpendicular Magnetic AnisotropyPlatinumPumpsSaturation MagnetizationSpin-Orbit CouplingsSpin-Pumping EffectsSurface Anisotropy
ISSN
0003-6951
Abstract
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. © 2016 AIP Publishing LLC.
URI
http://hdl.handle.net/20.500.11750/2698
DOI
10.1063/1.4945685
Publisher
American Institute of Physics Publishing
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceSpin Phenomena for Information Nano-devices(SPIN) Lab1. Journal Articles


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