在PtMn/(Co/Pd) n多层中选择堆工程模式,使确定性模拟旋转轨道扭矩突触成为可能
Abhijeet Ranjan1, Tamkeen Farooq2, Chong-Chi Chi3
1Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan.
ACS applied materials & interfaces
|March 11, 2026
概括
旋转轨道扭矩 (SOT) 设备可以通过调整Co/Pd多层重复数来调整二进制或模拟切换. 这为神经形态计算应用程序提供了高效的模拟SOT突触.
科学领域:
- 材料科学 材料科学 材料科学
- 这就是Spintronics.
- 神经形态计算是一种神经形态计算.
背景情况:
- 旋转轨道扭矩 (SOT) 设备为内存和神经形态计算提供了潜力.
- 控制开关模式 (二进制与模拟) 对设备应用至关重要.
- PtMn/(Co/Pd) n多层被研究了它们的SOT切换特性.
研究的目的:
- 为了证明PtMn/(Co/Pd) n多层中Co/Pd重复数 (nCo/Pd) 决定了磁化反转机制和切换模式.
- 探索这些多层作为神经形态硬件节能模拟SOT突触的潜力.
主要方法:
- 制造PtMn/(Co/Pd) n多层,具有不同的nCo/Pd.
- 通过材料参数调来研究磁化逆转机制 (核化,域壁传播).
- 电气调节SOT设备以诱导切换模式的转换.
- 评估用于神经形态应用的设备性能,包括突触可塑性和分类准确性.
主要成果:
- 对于nCo/Pd ≤7,通过核和域壁传播观察到二进制切换,通过电气调节过渡到模拟行为.
- 对于≥8的nCo/Pd,抑制的域壁传播导致了内在核化主导的模拟切换.
- 高nCo/Pd的堆在当前调节后表现出增强的模拟行为 (更平滑的强化/抑郁,更多的中间状态) 和>97%的神经形态分类准确度.
结论:
- Co/Pd重复数是一个关键的材料参数,用于控制PtMn/(Co/Pd) n多层中SOT切换模式.
- 堆设计和混合调为开发节能模拟SOT突触提供了可扩展的策略.
- 这些发现推动了自旋电子设备在神经形态计算架构中的集成.
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