论文标题
基于基于补偿的CO/GD基于全光开关的合成Ferrimagnet的超快赛道
Ultrafast racetrack based on compensated Co/Gd-based synthetic ferrimagnet with all-optical switching
论文作者
论文摘要
近年来，磁化磁化强度和单脉冲全光开关（AOS）是纳米磁性迅速前进的领域的两个主要成功，具有很高的潜力，可以实现新颖，快速和节能的记忆和逻辑平台。快速电流引起的域壁运动（CIDWM）和单射击AO已在不同的铁磁合金中单独证明。但是，对其组成控制的严格要求使这些合金挑战了晶圆尺度生产的材料。在这里，我们同时证明了基于多层的合成铁磁系统中的快速CIDWM和能源有效的AOS。我们首先表明AOS存在于其完整的组成范围内。我们发现，通过室温，通过层厚度调谐来补偿总角动量，在2000 m/s上以电流驱动的域壁速度进行。此外，CIDWM的分析模型表明，需要瞬时处理焦耳加热，以正确地描述我们的亚NS电流脉冲的CIDWM。我们的研究建立了基于[CO/GD]的合成铁磁铁，是域壁式壁式设备的独特材料平台，可访问超快单脉冲AOS。
Spin-orbitronics and single pulse all-optical switching (AOS) of magnetization are two major successes of the rapidly advancing field of nanomagnetism in recent years, with high potential for enabling novel, fast and energy-efficient memory and logic platforms. Fast current-induced domain wall motion (CIDWM) and single shot AOS have been individually demonstrated in different ferrimagnetic alloys. However, the stringent requirement for their composition control makes these alloys challenging materials for wafer-scale production. Here, we simultaneously demonstrate fast CIDWM and energy efficient AOS in a synthetic ferrimagnetic system based on multilayered [Co/Gd/Co/Gd]. We firstly show that AOS is present in its full composition range. We find that current-driven domain wall velocities over 2000 m/s at room temperature, achieved by compensating the total angular momentum through layer thickness tuning. Furthermore, analytical modeling of the CIDWM reveals that Joule heating needs to be treated transiently to properly describe the CIDWM for our sub-ns current pulses. Our studies establish [Co/Gd]-based synthetic ferrimagnets to be a unique materials platform for domain wall devices with access to ultrafast single pulse AOS.
