论文标题
双轴铁磁性绝缘体中电流引起的面内磁化切换
Current-induced in-plane magnetization switching in biaxial ferrimagnetic insulator
论文作者
论文摘要
铁磁绝缘子（FIMI）已在微波炉和磁光设备以及旋转的热量量货币方面进行了强烈使用，在该器件中，它们的磁化方向在设备性能中起着基本作用。通常通过施加外部磁场来切换磁化。在这里，我们研究了Y3FE5O12（YIG）/PT双层磁化磁化强度的电流诱导的自旋轨道扭矩（SOT）切换，具有平面磁各向异性，在其中通过Spin Hall MagnetResistance检测到开关。可逆切换在室温下，阈值电流密度为10^7 a cm^-2。具有反平行和不等磁矩的YIG sublattics与电流脉冲的方向平行或反平行，这与反铁磁系统中的Neel顺序切换一致。有人提出，这种切换行为可能是由作用于FIMI的两个反平行sublattices触发的。我们的发现不仅通过电气方式扩大了磁化的切换，并促进了对磁化切换的理解，而且还为全电机调制的微波设备和低功耗的旋转热量量铺平了道路。
Ferrimagnetic insulators (FiMI) have been intensively used in microwave and magneto-optical devices as well as spin caloritronics, where their magnetization direction plays a fundamental role on the device performance. The magnetization is generally switched by applying external magnetic fields. Here we investigate current-induced spin-orbit torque (SOT) switching of the magnetization in Y3Fe5O12 (YIG)/Pt bilayers with in-plane magnetic anisotropy, where the switching is detected by spin Hall magnetoresistance. Reversible switching is found at room temperature for a threshold current density of 10^7 A cm^-2. The YIG sublattices with antiparallel and unequal magnetic moments are aligned parallel or antiparallel to the direction of current pulses, which is consistent to the Neel order switching in antiferromagnetic system. It is proposed that such a switching behavior may be triggered by the antidamping-torque acting on the two antiparallel sublattices of FiMI. Our finding not only broadens the magnetization switching by electrical means and promotes the understanding of magnetization switching, but also paves the way for all-electrically modulated microwave devices and spin caloritronics with low power consumption.
