Time-Resolved Switching Characteristic in Magnetic Tunnel Junction with Spin Transfer Torque Write Scheme

被引：15
作者：
Iga, Fumitaka [1 ,2 ]
Yoshida, Yasuhiro [1 ,2 ]
Ikeda, Shoji [2 ,3 ]
Hanyu, Takahiro [2 ,3 ]
Ohno, Hideo [2 ,3 ]
Endoh, Tetsuo [1 ,2 ]
机构：
[1] Tohoku Univ, Interdisciplinary Res Ctr, Sendai, Miyagi 9808578, Japan
[2] Tohoku Univ, Ctr Spintron Integrated Syst, Sendai, Miyagi 9808578, Japan
[3] Tohoku Univ, Res Inst Elect Commun, Sendai, Miyagi 9808577, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2012年 / 51卷 / 02期
基金：
日本学术振兴会;
关键词：
D O I：
10.1143/JJAP.51.02BM02
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The time-resolved switching characteristics of 100 x 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 sigma V'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. (C) 2012 The Japan Society of Applied Physics
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页数：5
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