Current-controlled nanomagnetic writing for reconfigurable magnonic crystals
Current-controlled nanomagnetic writing for reconfigurable magnonic crystals
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DOI：
10.1038/s42005-020-00487-y
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发表时间：
2020-11-30
影响因子：
5.5
通讯作者：
Branford, Will R.
中科院分区：
文献类型：
--
作者：
Gartside, Jack C.;Jung, Son G.;Branford, Will R.
强相互作用的纳米磁性阵列对于不断增长的技术套件至关重要。这些阵列涵盖神经形态计算、超导涡旋控制和可重构磁振子，其实用性和吸引力在于其广泛的不同、稳定的磁化状态。不同的状态表现出不同的功能行为，使得精确、可重构的状态控制成为此类系统的重要基石。然而，很少有现有的方法可以反转任意阵列元素，甚至更少的方法可以在电气控制下做到这一点，这对于设备集成至关重要。我们通过相邻纳米线中横向磁畴壁的电流驱动运动证明了铁磁纳米岛的选择性、可重构磁反转。该反转技术在全电气控制下运行，不依赖外部磁场，使其非常适合跨多种磁波、自旋电子和神经形态逻辑架构的设备集成。在这里，利用反转技术来实现两个全固态可重构磁波晶体，提供磁波门控、滤波、类似晶体管的开关和峰值移位，而不依赖于全局磁场。对相互作用的纳米磁性阵列中的磁态进行精确的电控制是这些器件适用于多功能低功耗应用的要求。在这里，作者通过模拟展示了利用相邻纳米线中磁畴壁的电流驱动运动对磁性纳米岛的可逆控制。
Strongly-interacting nanomagnetic arrays are crucial across an ever-growing suite of technologies. Spanning neuromorphic computing, control over superconducting vortices and reconfigurable magnonics, the utility and appeal of these arrays lies in their vast range of distinct, stable magnetization states. Different states exhibit different functional behaviours, making precise, reconfigurable state control an essential cornerstone of such systems. However, few existing methodologies may reverse an arbitrary array element, and even fewer may do so under electrical control, vital for device integration. We demonstrate selective, reconfigurable magnetic reversal of ferromagnetic nanoislands via current-driven motion of a transverse domain wall in an adjacent nanowire. The reversal technique operates under all-electrical control with no reliance on external magnetic fields, rendering it highly suitable for device integration across a host of magnonic, spintronic and neuromorphic logic architectures. Here, the reversal technique is leveraged to realize two fully solid-state reconfigurable magnonic crystals, offering magnonic gating, filtering, transistor-like switching and peak-shifting without reliance on global magnetic fields.Precise electrical control of magnetic states in interacting nanomagnetic arrays is a requirement for these devices to be suitable for versatile low-power applications. Here, using simulations, the authors demonstrate reversible control of magnetic nanoislands using the current driven motion of a domain wall in an adjacent nanowire.