Reduction in critical current for spin transfer switching in perpendicular anisotropy spin valves using an in-plane spin polarizer
Reduction in critical current for spin transfer switching in perpendicular anisotropy spin valves using an in-plane spin polarizer
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DOI：
10.1063/1.3083546
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发表时间：
2009-02
影响因子：
4
通讯作者：
R. Law;E. Tan;R. Sbiaa;T. Liew;T. Chong
中科院分区：
文献类型：
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作者：
R. Law;E. Tan;R. Sbiaa;T. Liew;T. Chong
我们描述了一种通过插入面内自旋偏振器来减少基于 CoFe/Pd 的垂直各向异性单自旋阀 (SSV) 中的自旋转移切换 (STS) 电流的策略，从而创建改进的双自旋阀 (m-DSV)。对于 SSV 器件，在正电流下观察到两个磁性层同时存在 STS，从而不可能实现平行到反平行 (P→AP) 的转变。在 m-DSV 器件中，与 SSV 器件相比，我们观察到在 10 ns STS 电流脉冲下 AP→P 跃迁的能垒降低了 60%，JcAP→P 的能垒降低了 40%。此外，m-DSV结构使软层能够通过STS独立于硬层进行切换。
We describe a strategy to reduce spin transfer switching (STS) currents in CoFe/Pd-based perpendicular anisotropy single spin valves (SSVs) by the insertion of an in-plane spin polarizer, thus creating a modified-dual spin valve (m-DSV). For SSV devices, concurrent STS of both magnetic layers was observed for positive currents, making the parallel-to-antiparallel (P→AP) transition impossible. In m-DSV devices, we observed a 60% reduction in the energy barrier for AP→P transitions and a 40% reduction in JcAP→P with 10 ns STS current pulses compared to SSV devices. Furthermore, the m-DSV structure enabled the soft layer to switch independently from the hard layer via STS.