TY - JOUR
T1 - Time-Resolved switching characteristic in magnetic tunnel junction with spin transfer torque write scheme
AU - Iga, Fumitaka
AU - Yoshida, Yasuhiro
AU - Ikeda, Shoji
AU - Hanyu, Takahiro
AU - Ohno, Hideo
AU - Endoh, Tetsuo
PY - 2012/2/1
Y1 - 2012/2/1
N2 - 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.
AB - 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.
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U2 - 10.1143/JJAP.51.02BM02
DO - 10.1143/JJAP.51.02BM02
M3 - Article
AN - SCOPUS:84857465024
VL - 51
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
SN - 0021-4922
IS - 2 PART 2
M1 - 02BM02
ER -