Thickness dependence of the interfacial Dzyaloshinskii-Moriya interaction in inversion symmetry broken systems

Title
Thickness dependence of the interfacial Dzyaloshinskii-Moriya interaction in inversion symmetry broken systems
Authors
한동수Jaehun ChoNam-Hui KimSukmock LeeJune-Seo KimReinoud LavrijsenAurelie SolignacYuxiang YiNiels J. J. van HoofHenk J. M. SwagtenBert KoopmansChun-Yeol You
Issue Date
2015-07
Publisher
Nature Communications
Citation
VOL 6, 7635
Abstract
In magnetic multilayer systems, a large spin-orbit coupling at the interface between heavy metals and ferromagnets can lead to intriguing phenomena such as the perpendicular magnetic anisotropy, the spin Hall effect, the Rashba effect, and especially the interfacial Dzyaloshinskii-Moriya (IDM) interaction. This interfacial nature of the IDM interaction has been recently revisited because of its scientific and technological potential. Here we demonstrate an experimental technique to straightforwardly observe the IDM interaction, namely Brillouin light scattering. The non-reciprocal spin wave dispersions, systematically measured by Brillouin light scattering, allow not only the determination of the IDM energy densities beyond the regime of perpendicular magnetization but also the revelation of the inverse proportionality with the thickness of the magnetic layer, which is a clear signature of the interfacial nature. Altogether, our experimental and theoretical approaches involving double time Green's function methods open up possibilities for exploring magnetic hybrid structures for engineering the IDM interaction.
URI
http://pubs.kist.re.kr/handle/201004/70769
ISSN
2041-1723
Appears in Collections:
KIST Publication > Article
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