Spin transfer switching in the nanosecond regime for CoFeB/MgO/CoFeB ferromagnetic tunnel junctions

Tatsuya Aoki, Yasuo Ando, Daisuke Watanabe, Mikihiko Oogane, Terunobu Miyazaki

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Detailed spin transfer switching properties in the nanosecond region for CoFeB/MgO(001)/CoFeB magnetic tunnel junctions are reported. The switching current (IC) was greatly increased in the <10 ns region. This characteristic resembles that of current-perpendicular-to-plane giant magnetoresistance (CPP-GMR), although both the junction geometry and resistance differ from those of a CPP-GMR device. We discussed the switching properties considering the contribution of high frequency loss and the theoretical limitation of the analytical model. Furthermore, we observed real-time switching in the nanosecond region. Using these results, we discuss the spin transfer switching mechanism in the nanosecond region with both adiabatic and thermally activated models.

Original languageEnglish
Article number103911
JournalJournal of Applied Physics
Volume103
Issue number10
DOIs
Publication statusPublished - 2008 Jun 9

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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