Kammerbauer Fabian, Choi Won-Young, Freimuth Frank, Lee Kyujoon, Frömter Robert, Han Dong-Soo, Lavrijsen Reinoud, Swagten Henk J M, Mokrousov Yuriy, Kläui Mathias
Institute of Physics, Johannes Gutenberg-Universität Mainz, 55128 Mainz, Germany.
Center for Spintronics, Korea Institute of Science and Technology, 34141 Seoul, Republic of Korea.
Nano Lett. 2023 Aug 9;23(15):7070-7075. doi: 10.1021/acs.nanolett.3c01709. Epub 2023 Jul 19.
The recently discovered interlayer Dzyaloshinskii-Moriya interaction (IL-DMI) in multilayers with perpendicular magnetic anisotropy favors canting of spins in the in-plane direction. It could thus stabilize intriguing spin textures such as Hopfions. A key requirement for nucleation is to control the IL-DMI. Therefore, we investigate the influence of an electric current on a synthetic antiferromagnet with growth-induced IL-DMI. The IL-DMI is quantified by using out-of-plane hysteresis loops of the anomalous Hall effect while applying a static in-plane magnetic field at varied azimuthal angles. We observe a shift in the azimuthal dependence with an increasing current, which we conclude to originate from the additional in-plane symmetry breaking introduced by the current flow. Fitting the angular dependence, we demonstrate the presence of an additive current-induced term that linearly increases the IL-DMI in the direction of current flow. This opens the possibility of easily manipulating 3D spin textures by currents.
最近在具有垂直磁各向异性的多层膜中发现的层间Dzyaloshinskii-Moriya相互作用（IL-DMI）有利于面内方向自旋的倾斜。因此，它可以稳定诸如霍普夫离子等有趣的自旋纹理。成核的一个关键要求是控制IL-DMI。因此，我们研究了电流对具有生长诱导IL-DMI的合成反铁磁体的影响。在施加不同方位角的静态面内磁场时，通过使用反常霍尔效应的面外磁滞回线来量化IL-DMI。我们观察到随着电流增加，方位角依赖性发生了偏移，我们得出结论，这源于电流流动引入的额外面内对称性破缺。通过拟合角度依赖性，我们证明了存在一个附加的电流诱导项，该项在电流流动方向上线性增加IL-DMI。这为通过电流轻松操纵三维自旋纹理开辟了可能性。
