Time-Resolved switching characteristic in magnetic tunnel junction with spin transfer torque write scheme

Fumitaka Iga, Yasuhiro Yoshida, Shoji Ikeda, Takahiro Hanyu, Hideo Ohno, Tetsuo Endoh

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The time-resolved switching characteristics of 100 × 200nm 2 size CoFeB/MgO/CoFeB-based magnetic tunnel junction (MTJ) are investigated by using the 20 GHz sampling measurement technique.We focused on the physical quantities of the time-resolved characteristics such as incubation time t A, transit time t B, and the standard deviations σV's of the period of the switching waveform. Furthermore, the dependencies of t A and t B on the applied pulse waveforms are analyzed. We found t A exponentially decreases as the applied voltage to MTJ increases, while t B remains less than two nano seconds regardless of the applied voltage. Furthermore, it is observed that the standard deviations of the waveform during t A is larger than that of the other periods. Finally, we discuss the switching characteristics with proposed toy model based on spin transfer torque (STT) phenomena.

Original languageEnglish
Article number02BM02
JournalJapanese journal of applied physics
Volume51
Issue number2 PART 2
DOIs
Publication statusPublished - 2012 Feb 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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