Dependence of interfacial Dzyaloshinskii-Moriya interaction and perpendicular magnetic anisotropy on the thickness of the heavy-metal layer

The interfacial Dzyaloshinskii-Moriya interaction (iDMI) and the interfacial perpendicular magnetic anisotropy (iPMA) between a heavy metal and ferromagnet are investigated by employing Brillouin light scattering. With increasing thickness of the heavy-metal (Pt) layer, the iDMI and iPMA energy dens...

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Published inApplied physics express Vol. 10; no. 10; pp. 103003 - 103006
Main Authors Kim, Nam-Hui, Han, Dong-Soo, Jung, Jinyong, Park, Kwonjin, Swagten, Henk J. M., Kim, June-Seo, You, Chun-Yeol
Format Journal Article
LanguageEnglish
Published The Japan Society of Applied Physics 01.10.2017
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Summary:The interfacial Dzyaloshinskii-Moriya interaction (iDMI) and the interfacial perpendicular magnetic anisotropy (iPMA) between a heavy metal and ferromagnet are investigated by employing Brillouin light scattering. With increasing thickness of the heavy-metal (Pt) layer, the iDMI and iPMA energy densities are rapidly enhanced and they saturate for a Pt thickness of 2.4 nm. Since these two individual magnetic properties show the same Pt thickness dependence, this is evidence that the iDMI and iPMA at the interface between the heavy metal and ferromagnet, the physical origin of these phenomena, are effectively enhanced upon increasing the thickness of the heavy-metal layer.
ISSN:1882-0778
1882-0786
DOI:10.7567/APEX.10.103003