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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.

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概括
此摘要是机器生成的。

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.

关键词:
人工神经网络的人工神经网络人工突触 (Synapses) 是一个人工突触.二进制交换机二进制交换机多层次的开关多层次的开关神经形态计算是一种神经形态计算.旋转-轨道扭矩

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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.