Switching of perpendicular magnetization by spin-orbit torques in the absence of external magnetic fields

Guoqiang Yu, Pramey Upadhyaya, Yabin Fan, Juan G. Alzate, Wanjun Jiang, Kin L. Wong, So Takei, Scott A. Bender, Li Te Chang, Ying Jiang, Murong Lang, Jianshi Tang, Yong Wang, Yaroslav Tserkovnyak, Pedram Khalili Amiri, Kang L. Wang

研究成果: Article同行評審

583 引文 斯高帕斯(Scopus)

摘要

Magnetization switching by current-induced spin-orbit torques is of great interest due to its potential applications in ultralow-power memory and logic devices. The switching of ferromagnets with perpendicular magnetization is of particular technological relevance. However, in such materials, the presence of an in-plane external magnetic field is typically required to assist spin-orbit torque-driven switching and this is an obstacle for practical applications. Here, we report the switching of out-of-plane magnetized Ta/Co 20 Fe 60 B 20 /TaO x structures by spin-orbit torques driven by in-plane currents, without the need for any external magnetic fields. This is achieved by introducing a lateral structural asymmetry into our devices, which gives rise to a new field-like spin-orbit torque when in-plane current flows in these structures. The direction of the current-induced effective field corresponding to this field-like spin-orbit torque is out-of-plane, facilitating the switching of perpendicular magnets.

原文English
頁(從 - 到)548-554
頁數7
期刊Nature Nanotechnology
9
發行號7
DOIs
出版狀態Published - 2014 7月

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 原子與分子物理與光學
  • 生物醫學工程
  • 材料科學(全部)
  • 凝聚態物理學
  • 電氣與電子工程

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