Avci Can Onur, Lambert Charles-Henri, Sala Giacomo, Gambardella Pietro
Department of Materials, ETH Zürich, CH-8093 Zürich, Switzerland.
Phys Rev Lett. 2021 Oct 15;127(16):167202. doi: 10.1103/PhysRevLett.127.167202.
We report on the occurrence of strong interlayer Dzyaloshinskii-Moriya interaction (DMI) between an in-plane magnetized Co layer and a perpendicularly magnetized TbFe layer through a Pt spacer. The DMI causes a chiral coupling that favors one-handed orthogonal magnetic configurations of Co and TbFe, which we reveal through Hall effect and magnetoresistance measurements. The DMI coupling mediated by Pt causes effective magnetic fields on either layer of up to 10-15 mT, which decrease monotonically with increasing Pt thickness. Ru, Ta, and Ti spacers mediate a significantly smaller coupling compared to Pt, highlighting the essential role of Pt in inducing the interlayer DMI. These results are relevant to understand and maximize the interlayer coupling induced by the DMI as well as to design spintronic devices with chiral spin textures.
我们报道了通过铂间隔层在面内磁化的钴层与垂直磁化的铽铁层之间出现强层间Dzyaloshinskii-Moriya相互作用（DMI）。DMI导致一种手性耦合，这种耦合有利于钴和铽铁的单手正交磁构型，我们通过霍尔效应和磁阻测量揭示了这一点。由铂介导的DMI耦合在两层上产生高达10 - 15 mT的有效磁场，该磁场随铂厚度的增加而单调减小。与铂相比，钌、钽和钛间隔层介导的耦合要小得多，这突出了铂在诱导层间DMI中的关键作用。这些结果对于理解和最大化由DMI诱导的层间耦合以及设计具有手性自旋纹理的自旋电子器件具有重要意义。
