Reduction in critical current for spin transfer switching in perpendicular anisotropy spin valves using an in-plane spin polarizer

Randall Law, Ei Leen Tan, Rachid Sbiaa, Thomas Liew, Tow Chong Chong

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Abstract

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 J c AP→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.

Original languageEnglish
Article number062516
JournalApplied Physics Letters
Volume94
Issue number6
DOIs
Publication statusPublished - 2009

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ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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