论文标题
与双层稀土过渡金属铁磁铁中的合成反铁磁铁中的超快切换
Ultrafast Switching in Synthetic Antiferromagnet with Bilayer Rare-Earth Transition-Metal Ferrimagnets
论文作者
论文摘要
在Spintronics中，重要的是能够快速可靠地操纵磁化强度。几种方法可以通过应用电流脉冲或磁场来控制磁化强度。施加的电流可以通过自旋扭矩效应以纳秒速度逆转磁化。为了更快的切换，在无定形的稀土过渡金属铁磁铁中，已经实现了使用飞秒激光脉冲的子秒切换。在这项研究中，我们采用了原子模拟来研究与双层无定形FEGD Ferrimagnets合成反铁磁铁中的超快切换。使用两个温度模型，我们证明了在没有外部磁场的合成反铁磁铁中的超快切换。此外，我们表明，如果我们最初稳定在此异质结构中的天空，则超快激光器可以使用相同的机制切换天空状态。此外，这种双层设计允许单独控制每个铁磁层，并打开磁性隧道连接处的可能性。
In spintronics, it is important to be able to manipulate magnetization rapidly and reliably. Several methods can control magnetization, such as by applying current pulses or magnetic fields. An applied current can reverse magnetization with nanosecond speed through the spin torque effect. For faster switching, subpicosecond switching with femtoseconds laser pulse has been achieved in amorphous rare-earth transition-metal ferrimagnets. In this study, we employed atomistic simulations to investigate ultrafast switching in a synthetic antiferromagnet with bilayer amorphous FeGd ferrimagnets. Using a two-temperature model, we demonstrated ultrafast switching in this synthetic antiferromagnet without external magnetic fields. Furthermore, we showed that if we initially stabilize a skyrmion in this heterostructure, the ultrafast laser can switch the skyrmion state using the same mechanism. Furthermore, this bilayer design allows the control of each ferrimagnetic layer individually and opens the possibility for a magnetic tunnel junction.
