Surface acoustic wave induced modulation of tunneling magnetoresistance in magnetic tunnel junctions
Surface acoustic wave induced modulation of tunneling magnetoresistance in magnetic tunnel junctions
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DOI：
10.1063/5.0051905
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发表时间：
2021-03
影响因子：
3.2
通讯作者：
Dhritiman Bhattacharya;P. Sheng;Md Ahsanul Abeed;Zhengyang Zhao;Hongshi Li;Jianping Wang;Supriyo Bandyopadhyay
中科院分区：
文献类型：
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作者：
Dhritiman Bhattacharya;P. Sheng;Md Ahsanul Abeed;Zhengyang Zhao;Hongshi Li;Jianping Wang;Supriyo Bandyopadhyay
我们表明，施加在磁隧道结 (MTJ) 端子上的表面声波 (SAW) 会降低 MTJ 的（时间平均）并联电阻和反并联电阻，其中后者的降低幅度远大于前者。这导致隧道磁阻（TMR）比率降低。然而，MTJ 的自由层和固定层的矫顽力并未受到显着影响，这表明 SAW 在所使用的功率水平下不会通过逆磁致伸缩（Villari）效应在磁性层中引起大角度磁化旋转。这项研究揭示了 MTJ 在周期性压缩和拉伸应变下的动态行为。
We show that a surface acoustic wave (SAW) applied across the terminals of a magnetic tunnel junction (MTJ) decreases both the (time-averaged) parallel and antiparallel resistances of the MTJ, with the latter decreasing much more than the former. This results in a decrease of the tunneling magnetoresistance (TMR) ratio. The coercivities of the free and fixed layer of the MTJ, however, are not affected significantly, suggesting that the SAW does not cause large-angle magnetization rotation in the magnetic layers through the inverse magnetostriction (Villari) effect at the power levels used. This study sheds light on the dynamical behavior of an MTJ under periodic compressive and tensile strain.