Topologically distinct magnetic structures like skyrmions, domain walls, and the uniformly magnetized state have multiple applications in logic devices, sensors, and as bits of information. One of the most promising concepts for applying these bits is the racetrack architecture controlled by electric currents or magnetic driving fields. In state-of-the-art racetracks, these fields or currents are applied to the whole circuit. Here, we employ micromagnetic and atomistic simulations to establish a concept for racetrack memories free of global driving forces. Surprisingly, we realize that mixed sequences of topologically distinct objects can be created and propagated over far distances exclusively by local rotation of magnetization at the sample boundaries. We reveal the dependence between chirality of the rotation and the direction of propagation and define the phase space where the proposed procedure can be realized. The advantages of this approach are the exclusion of high current and field densities as well as its compatibility with an energy-efficient three-dimensional design.

拓扑不同的磁性结构，如斯格明子、畴壁和均匀磁化状态，在逻辑器件、传感器和信息位中具有多种应用。应用这些位的最有前途的概念之一是由电流或磁驱动场控制的赛道架构。在最先进的赛道中，这些场或电流应用于整个电路。在这里，我们采用微磁和原子模拟来建立一个没有全球驱动力的赛道记忆概念。令人惊讶的是，我们意识到拓扑不同对象的混合序列可以通过样本边界处磁化的局部旋转来创建和传播到很远的距离。我们揭示了旋转手性与传播方向之间的依赖性，并定义了可以实现所提出程序的相空间。这种方法的优点是排除了高电流和场密度以及与节能三维设计的兼容性。