论文标题
平面旋转轨道扭矩磁力化开关及其使用sub-GHz频率下的自旋矫正效果检测
Inplane spin orbit torque magnetization switching and its detection using the spin rectification effect at sub-GHz frequencies
论文作者
论文摘要
使用自旋矫正效果检测到Permalloy/Platinum双层的平面磁化逆转。使用子GHz微波频率激发双层中的自旋扭矩铁磁共振（ST FMR），可在0 mt的外部静态磁场周围诱导两个离散的直流电压。这些离散的电压取决于粘合色的磁化方向，并能够检测到平面磁化逆转。磁化逆转的阈值电流密度从10 mA/cm^2分别，与已知的旋转轨道扭矩（SOT）开关相同的顺序，带有面内磁化材料。信号的大小相同或大于典型的ST FMR信号的大小。也就是说，尽管偏离最佳的ST-FMR条件，但磁化切换的检测还是高度敏感的。该方法即使适用于宽度为100 nm的小铁磁电极，也适用于简单的设备结构。
Inplane magnetization reversal of a permalloy/platinum bilayer was detected using the spin rectification effect. Using a sub GHz microwave frequency to excite spin torque ferromagnetic resonance (ST FMR) in the bilayer induces two discrete DC voltages around an external static magnetic field of 0 mT. These discrete voltages depend on the magnetization directions of the permalloy and enable detection of the inplane magnetization reversal. The threshold current density for the magnetization reversal is from 10 to 20 MA/cm^2, the same order as for known spin orbit torque (SOT) switching with in-plane magnetization materials. The magnitude of the signal is the same or larger than that of the typical ST FMR signal; that is, detection of magnetization switching is highly sensitive in spite of deviation from the optimal ST-FMR condition. The proposed method is applicable to a simple device structure even for a small ferromagnetic electrode with a width of 100 nm.
