Rowan-Robinson R M, Stashkevich A A, Roussigné Y, Belmeguenai M, Chérif S-M, Thiaville A, Hase T P A, Hindmarch A T, Atkinson D
Department of Physics, University of Durham, Durham, DH1 3LE, United Kingdom.
Department of Physics and Astronomy, Uppsala University, Box 516 751 20, Uppsala, Sweden.
Sci Rep. 2017 Dec 4;7(1):16835. doi: 10.1038/s41598-017-17137-z.
The Dzyaloshinskii-Moriya interaction has been shown to stabilise Nèel domain walls in magnetic thin films, allowing high domain wall velocities driven by spin current effects. The interfacial Dzyaloshinskii-Moriya interaction (IDMI) occurs at the interface between ferromagnetic and heavy metal layers with strong spin-orbit coupling, but details of the interaction remain to be understood and the role of proximity induced magnetism (PIM) in the heavy metal is unknown. Here IDMI and PIM are reported in Pt determined as a function of Au and Ir spacer layers in Pt/Co/Au,Ir/Pt. Both interactions are found to be sensitive to sub-nanometre changes in the spacer thickness, correlating over sub-monolayer spacer thicknesses, but not for thicker spacers where IDMI continues to change even after PIM is lost.
已经证明，Dzyaloshinskii-Moriya相互作用能够稳定磁性薄膜中的奈尔畴壁，从而实现由自旋电流效应驱动的高畴壁速度。界面Dzyaloshinskii-Moriya相互作用（IDMI）发生在具有强自旋轨道耦合的铁磁层和重金属层之间的界面处，但这种相互作用的细节仍有待了解，并且重金属中近邻诱导磁性（PIM）的作用尚不清楚。本文报道了在Pt/Co/Au,Ir/Pt中，IDMI和PIM作为Au和Ir间隔层的函数在Pt中的情况。发现这两种相互作用对间隔层厚度的亚纳米变化都很敏感，在亚单层间隔层厚度范围内具有相关性，但对于较厚的间隔层则不然，即使PIM消失后，IDMI仍会继续变化。
