Skyrmions in synthetic antiferromagnets (SAFs) could be immune to the skyrmion Hall effect and are, thus, promising in spintronics applications. We introduce breathing modes that can be realized by changing the magnetocrystalline anisotropy periodically in time to generate spin waves around a deformed SAF skyrmion. The net momentum transferred from the magnon spin currents results in a motion of the SAF skyrmion, which is two orders of magnitude faster than that of a ferromagnetic skyrmion. We also reveal that the velocity of the SAF skyrmion can be manipulated by the strength of antiferromagnetic coupling between layers, which is different from ferromagnetic and antiferromagnetic systems. This phenomenon originates from the damping-like character of the antiferromagnetic coupling and offers a dimension to optimize skyrmion dynamics in SAFs.

中文翻译：

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层间耦合对合成反铁磁体中天体离子动力学的影响

合成反铁磁体（SAF）中的Skyrmion可能不受Skyrmion霍尔效应的影响，因此在自旋电子学应用中很有前途。我们介绍了可以通过定期改变磁晶各向异性，在变形的SAF天体周围产生自旋波来实现的呼吸模式。磁振子自旋电流传递的净动量会导致SAF天蝎子的运动，它比铁磁天蝎子的运动快两个数量级。我们还揭示了SAF天蝎子的速度可以通过层之间反铁磁耦合的强度来控制，这不同于铁磁和反铁磁系统。这种现象源于反铁磁耦合的阻尼特性，并提供了优化SAF中的Skyrmion动力学的尺寸。