Spin logic operations based on magnetization switching by asymmetric spin current
Spin logic operations based on magnetization switching by asymmetric spin current
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DOI：
10.1007/s11432-020-3246-8
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发表时间：
2021-11
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影响因子：
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通讯作者：
Yucai Li;Nan Zhang;Kaiyou Wang
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文献类型：
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作者：
Yucai Li;Nan Zhang;Kaiyou Wang
基于自旋轨道力矩（SOT）的自旋电子器件具有低功耗、高速度、可重构和高耐久性等优点，为基于自旋逻辑器件的存储计算提供了前景。通过设计局部自旋电流梯度，可以使用微磁模拟在没有外部磁场的情况下通过非对称自旋电流确定性地切换磁化，其中可以通过自旋梯度生成附加的面外有效场。通过在半个Pt/Co/Pt SOT器件上覆盖Pt条，我们在实验上证明了无场确定性电流感生磁化翻转。最后，我们设计了基于这些器件的AND、NAND、OR和NOR布尔逻辑门，它们可以作为可编程和有状态逻辑运算的构建模块。
Spintronic devices based on spin orbit torques (SOT) exhibit advantages in low power consumption, high speed, reconfigurability, and high endurance, which offers the prospect of in-memory computing based on spin logic devices. By designing a local spin current gradient, the magnetization can be switched deterministically by asymmetric spin currents without external magnetic field using micromagnetic simulations, where an additional out of plane effective field can be generated by the spin gradient. Through capping half of the Pt/Co/Pt SOT devices with Pt strip, we demonstrate the field-free deterministic current-induced magnetization switching experimentally. Finally, we design AND, NAND, OR, and NOR Boolean logic gates based on these devices, which could be used as building blocks for programmable and stateful logic operations.