Precise control of magnetic domain wall displacement by a nanosecond current pulse in Co/Ni nanowires
Precise control of magnetic domain wall displacement by a nanosecond current pulse in Co/Ni nanowires
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DOI：
10.7567/apex.8.073008
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发表时间：
2015-07-01
影响因子：
2.3
通讯作者：
Ono, Teruo
中科院分区：
文献类型：
--
作者：
Taniguchi, Takuya;Kim, Kab-Jin;Ono, Teruo
研究了在Co/Ni纳米线中，由绝热自旋转移扭矩(STT)或自旋霍尔扭矩(SHT)驱动的Co/Ni纳米线中由纳秒电流脉冲引起的磁畴壁运动。DW位移，包括暂态位移和稳态位移，都与电流感应扭矩的电流脉冲宽度成线性关系。瞬时位移小于DW位移的10%。这一结果意味着可以通过调节电流脉冲的持续时间来控制DW位置，从而实现赛道存储器的稳健操作。(C)2015年日本应用物理学会
Magnetic domain wall (DW) motion induced by nanosecond current pulses is investigated in Co/Ni nanowires where the DW motion is driven by either adiabatic spin transfer torque (STT) or spin Hall torque (SHT). The DW displacement, including transient displacement and steady-state displacement, is found to be linearly related to the current pulse duration for both current-induced torques. The transient displacement is found to be less than 10% of the DW displacement. This result implies that the DW position can be controlled by tuning the duration of the current pulse, which enables a robust operation of racetrack memory. (C) 2015 The Japan Society of Applied Physics