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首页> 外文期刊>IEEE Transactions on Magnetics >Spin–Orbit Torque and Dipole Coupling for Nanomagnetic Array Programmability
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Spin–Orbit Torque and Dipole Coupling for Nanomagnetic Array Programmability

机译：用于纳米磁性阵列可编程性的旋转轨道扭矩和偶极耦合

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Computational architectures that rely on an array of dipole-coupled nanomagnetic elements require an energy-efficient method of programming individual elements within the array. As a low-energy, selective method of controlling magnetization, spin-orbit torque (SOT) represents a promising solution. Here, a finite-difference micromagnetic model is used to characterize the dipole coupling between adjacent CoFeB nanodisks and to determine the critical SOT current required to switch these disks. Additionally, a phase plot showing disk dimensions at which both vortex and single-domain in-plane magnetic states are stable is produced. A dipole-coupled array's response to dynamic application of SOT current is also simulated. The results show that the rate of applying SOT current to one element in the array strongly influences the stable states of adjacent elements and that the SOT current amplitude required for this influence is an order of magnitude lower than the previously determined critical switching current. This indicates that SOT current dynamics play a significant role in the behavior of a dipole-coupled array. Finally, an architecture to achieve programmability in nanomagnetic computational platforms with SOT is presented.
机译：依赖于偶极耦合的纳米磁性元件阵列的计算架构需要节能的编程阵列中的各个元素的方法。作为控制磁化的低能量，选择性方法，旋转轨道扭矩（SOT）代表了有希望的解决方案。这里，有限差分微磁模型用于表征相邻CoFeB纳米DIFISK之间的偶极耦合，并确定切换这些磁盘所需的临界SOT电流。另外，产生涡旋和单畴内磁力状态稳定的磁盘尺寸的相位曲线。还模拟了偶极耦合阵列对动态应用SOT电流的响应。结果表明，将SOT电流应用于阵列中的一个元件的速率强烈影响相邻元件的稳定状态，并且这种影响所需的SOT电流幅度是比先前确定的临界开关电流低的数量级。这表明SOT当前动态在偶极耦合阵列的行为中发挥着重要作用。最后，提出了一种在具有SOT中实现纳米磁性计算平台中的可编程性的架构。

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