Effect of wavy spin-transfer torque on ultrafast unipolar switching of a nanomagnet with out-of-plane polarizer

Seo Won Lee, Kyoung Jin Lee

Research output: Contribution to journalArticle

2 Citations (Scopus)


We report that current-induced ultrafast unipolar switching can be realized by utilizing wavy spin-transfer torque (STT) and out-of-plane polarizer. Two spin-valve structures with normal STT and wavy STT are studied to investigate the effect of wavy STT on ultrafast precessional switching. We find that for the structure with normal STT, only antiparallel (AP)-to-parallel (P) switching occurs in one polarity of current whereas for the structure with wavy STT, both P-to-AP and AP-to-P switchings occur, showing alternative switching patterns as a function of current and pulse width.

Original languageEnglish
Article number6027797
Pages (from-to)3872-3875
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number10
Publication statusPublished - 2011 Oct 1



  • Spin-transfer torque (STT)
  • ultrafast switching
  • wavy spin-transfer torque

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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