Ruotolo A, Cros V, Georges B, Dussaux A, Grollier J, Deranlot C, Guillemet R, Bouzehouane K, Fusil S, Fert A
Unité Mixte de Physique CNRS/Thales and Université Paris Sud 11, Palaiseau, France.
Nat Nanotechnol. 2009 Aug;4(8):528-32. doi: 10.1038/nnano.2009.143. Epub 2009 Jun 21.
Synchronized spin-valve oscillators may lead to nanosized microwave generators that do not require discrete elements such as capacitors or inductors. Uniformly magnetized oscillators have been synchronized, but offer low power. Gyrating magnetic vortices offer greater power, but vortex synchronization has yet to be demonstrated. Here we find that vortices can interact with each other through the mediation of antivortices, leading to synchronization when they are closely spaced. The synchronization does not require a magnetic field, making the system attractive for electronic device integration. Also, because each vortex is a topological soliton, this work presents a model experimental system for the study of interacting solitons.
同步自旋阀振荡器可能会催生无需电容器或电感器等分立元件的纳米级微波发生器。均匀磁化的振荡器已实现同步，但功率较低。旋转磁涡旋能提供更大的功率，但涡旋同步尚未得到证实。在此，我们发现涡旋可以通过反涡旋的介导相互作用，当它们间距很近时会导致同步。这种同步不需要磁场，这使得该系统对电子器件集成具有吸引力。此外，由于每个涡旋都是一个拓扑孤子，这项工作提出了一个用于研究相互作用孤子的模型实验系统。
