Polishchuk D M, Tykhonenko-Polishchuk Yu O, Lytvynenko Ya M, Rostas A M, Gomonay O V, Korenivski V
Nanostructure Physics, Royal Institute of Technology, 10691 Stockholm, Sweden.
Institute of Magnetism of the NAS of Ukraine and MES of Ukraine, 03142 Kyiv, Ukraine.
Phys Rev Lett. 2021 Jun 4;126(22):227203. doi: 10.1103/PhysRevLett.126.227203.
We observe a strong thermally controlled magnon-mediated interlayer coupling of two ferromagnetic layers via an antiferromagnetic spacer in spin-valve type trilayers. The effect manifests itself as a coherent switching as well as collective resonant precession of the two ferromagnets, which can be controlled by varying temperature and the spacer thickness. We explain the observed behavior as due to a strong hybridization of the ferro- and antiferromagnetic magnon modes in the trilayer at temperatures just below the Néel temperature of the antiferromagnetic spacer.
我们观察到在自旋阀型三层结构中，通过反铁磁间隔层，两个铁磁层之间存在强烈的热控磁振子介导的层间耦合。这种效应表现为两个铁磁体的相干开关以及集体共振进动，可通过改变温度和间隔层厚度来控制。我们将观察到的行为解释为，在温度略低于反铁磁间隔层的奈尔温度时，三层结构中铁磁和反铁磁磁振子模式发生了强烈的杂化。
