Magnetic skyrmions are topologically protected spin structures, offering great promise as information carriers for future spintronic devices. However, a series of challenges, such as unreliable skyrmion motion, pinning effects, and a weak read-out signal, prevent the development of skyrmionic applications. The recently demonstrated capability to engineer the local exchange-bias field (LEBF) in an exchange biased composite, provides solutions to these challenges. By exploiting LEBF, we design and analyze a robust skyrmion shift device. LEBF-induced magnetic domain walls form the boundary of the device channel, and LEBF potential wells are implemented in the channel for positioning skyrmions. Based on simulations with comprehensive models, we demonstrate the proposed device has the advantages of (i) localizing the skyrmions in the absence of current, (ii) suppressing skyrmion annihilation during transport, (iii) promoting steady skyrmion motion, (iv) enhancing the skyrmion velocity, and (v) magnifying the read-out signal. Our results form the basis for the design of robust and novel skyrmion devices through LEBF engineering.

中文翻译：

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通过本地交换偏置现场工程设计的坚固的Skyrmion移位装置

磁性天体是受拓扑保护的自旋结构，作为未来自旋电子设备的信息载体，具有广阔的前景。但是，一系列挑战（例如，不可靠的天体离子运动，钉扎效应和微弱的读出信号）阻碍了天体离子应用的发展。最近展示的在交换偏置复合体中工程局部交换偏置场（LEBF）的能力为这些挑战提供了解决方案。通过利用LEBF，我们设计并分析了一种坚固的Skyrmion移位设备。LEBF感应的磁畴壁形成了设备通道的边界，并且在通道中实现了LEBF势阱，用于定位天敌。基于具有全面模型的仿真，我们证明了所提出的设备具有以下优点：（i）在没有电流的情况下定位天体 （ii）抑制运输过程中的天敌离子ni灭，（iii）促进天敌离子稳定运动，（iv）提高天敌离子速度，以及（v）放大读出信号。我们的结果构成了通过LEBF工程设计坚固耐用的新型Skyrmion设备的基础。